All Calculators & Tools

Calculate your monthly mortgage payment, total interest, and total cost of your home loan.

See how your money grows over time with the power of compound interest.

Calculate monthly payments, total interest, and payoff date for any loan.

Project the future value of your investments with regular contributions.

Plan your retirement savings and estimate your monthly retirement income.

Project your pension pot and monthly retirement income with inflation adjustments in today's money.

Find out when you'll be debt-free and how much interest you'll pay.

Convert between hourly, daily, weekly, biweekly, monthly, and annual salary.

Calculate how much you need to save monthly to reach your financial goal.

Calculate return on investment as a percentage from cost and gain.

Calculate gross and net profit margin from revenue and costs.

Calculate how inflation erodes purchasing power over time.

Calculate the break-even point in units and revenue for your business.

Convert between markup percentage and profit margin percentage.

Compare the total cost of renting versus buying a home over time.

Calculate dividend yield, annual income, and yield on cost for stocks.

See how dollar cost averaging builds wealth with regular investments over time.

Estimate how much money solar panels can save on your electricity bills.

Calculate your federal income tax based on your filing status and taxable income.

Calculate your monthly car payment, total interest, and total cost of an auto loan.

Calculate how long it takes to pay off credit card debt and how much interest you'll pay.

Calculate your total net worth by adding up assets and subtracting liabilities.

Find out how much house you can afford based on your income, debts, and down payment.

Calculate monthly payments, total interest, and total cost for a business loan.

Convert between major world currencies using approximate exchange rates.

Calculate your take-home pay after federal tax, state tax, FICA, and deductions.

Project your 401(k) retirement savings with employer match and compound growth.

Generate a full month-by-month amortization schedule for any loan.

Calculate stock trading profit, ROI, and capital gains from buy and sell prices.

Calculate certificate of deposit maturity value and interest earned.

See how your savings grow with interest and regular monthly deposits.

Estimate house flipping profit, ROI, and the 70% rule for real estate investors.

Calculate student loan payments under standard, graduated, extended, and income-driven plans.

Estimate federal estate tax based on estate value, exemptions, and filing status.

Calculate cryptocurrency trading profit, ROI, and capital gains.

Create professional invoices with line items, tax, discount, and download as PDF.

Create detailed invoices with per-item tax, unit codes, and individual discounts. Download as PDF.

Calculate your FIRE number, years to financial independence, and monthly savings needed to retire early.

Find out how much rent you can afford using the 30% rule and 50/30/20 budget breakdown.

Calculate federal capital gains tax with short-term and long-term rates, NIIT, and 2024 brackets.

Calculate your home down payment target, savings gap, and timeline to save enough.

Estimate state inheritance tax for the 6 US states that levy it by relationship type.

Calculate your side hustle take-home pay after self-employment tax and income tax.

Calculate how much you need in your emergency fund and track progress toward your goal.

Compare the total cost of leasing versus buying a car to find the cheaper option.

Calculate home equity line of credit: available equity, monthly payment, and total interest.

Compare debt payoff strategies: snowball (smallest first) vs avalanche (highest rate first).

Calculate current yield, yield to maturity, and bond price from coupon rate and market price.

Calculate call/put option profit/loss from strike price, premium, underlying price, and contracts.

Calculate your ideal hourly and project rate from target income, expenses, and billable hours.

Calculate sales tax amount and total price from subtotal and tax rate.

Calculate VAT-inclusive and VAT-exclusive prices, VAT amount from net or gross price and rate.

Split tips among staff based on hours worked or point system.

Calculate take-home pay after income tax, social security, and medicare for multiple countries.

Calculate months of runway from cash balance, monthly burn rate, and revenue.

Calculate MRR, ARR, churn rate, LTV, CAC ratio, and quick ratio from subscription data.

Calculate your monthly boat loan payment, total interest, and financing cost. Compare marine loan rates and terms for new and used boats wit...

Calculate your monthly car loan payment, total interest, and total cost of financing a vehicle. Compare new and used car loan rates with our...

Calculate your cost per acquisition (CPA), LTV:CPA ratio, and marketing ROI instantly. Free CPA calculator for customer acquisition analysis...

Calculate your cost per click (CPC), CPM, and click-through rate instantly. Free CPC calculator for digital advertising campaigns — no sign-...

Calculate your cost per lead (CPL), cost per qualified lead, and conversion rate instantly. Free CPL calculator for marketing campaigns — no...

Compare cost of living between cities. Enter your salary and city indexes to find the equivalent salary needed, purchasing power difference,...

Calculate basic earnings per share (EPS), P/E ratio, and earnings yield instantly. Free EPS calculator for stock analysis — no sign-up requi...

Calculate your monthly FHA mortgage payment including MIP, total interest, and total loan cost. Understand FHA loan requirements with our fr...

Calculate your freelance self-employment tax, estimated quarterly payments, and take-home pay. Understand the 15.3% SE tax and deductible ex...

Calculate your monthly home equity loan payment, total interest, and borrowing cost. Compare HELOC vs fixed home equity loan options with ou...

Calculate your take-home pay from an hourly wage. See federal tax, state tax, Social Security, and Medicare deductions for hourly workers, p...

Calculate total project cost from your hourly rate, estimated hours, expenses, and tax rate. See effective rate and after-tax income instant...

Convert hourly rate to annual salary or annual salary to hourly rate. See daily, weekly, biweekly, and monthly pay with customizable hours a...

Calculate your monthly jumbo mortgage payment, total interest, and loan cost for high-value homes exceeding conforming loan limits. Free jum...

Calculate how your money market account grows over time with compound interest. Compare money market rates, minimum balances, and tiered APY...

Calculate your monthly motorcycle loan payment, total interest, and financing cost. Compare rates for new and used motorcycles with our free...

Calculate overtime pay, regular pay, and total pay. Enter hourly rate, regular hours, overtime hours, and OT multiplier to see your complete...

Calculate your monthly personal loan payment, total interest, and total cost. Compare rates for debt consolidation, home improvement, and ot...

Calculate your monthly RV loan payment, total interest, and financing cost. Compare rates and terms for new and used recreational vehicle lo...

Calculate your new monthly payment after refinancing, total savings, and break-even point. Compare rate-and-term vs cash-out refinance optio...

Calculate revenue per employee annually, monthly, and quarterly. Free revenue per employee calculator with optional profit per employee anal...

Convert any salary between hourly, daily, weekly, biweekly, monthly, and annual. Customize hours per week and weeks per year for precise res...

Calculate how your savings grow over time with compound interest. Compare high-yield savings accounts, CDs, and money market rates with our...

Calculate how much you need to save per month to reach your savings goal. Free monthly savings calculator with optional interest rate for gr...

Calculate your monthly VA mortgage payment with no down payment and no PMI. Estimate total interest and loan cost for VA-eligible veterans a...

Full scientific calculator with trigonometry, logarithms, exponents, factorials, memory, and degree/radian modes.

Calculate percentages, percentage change, and percentage of a number.

Add, subtract, multiply, and divide fractions with step-by-step solutions.

Calculate the area of common shapes including rectangles, circles, and triangles.

Calculate the circumference and area of a circle from radius or diameter.

Calculate the result of raising a number to any power.

Calculate the missing side of a right triangle using a² + b² = c².

Solve ax² + bx + c = 0 and find real or complex roots.

Calculate mean, standard deviation, and variance from a set of numbers.

Find the greatest common divisor and least common multiple of two numbers.

Calculate the required sample size for surveys and experiments.

Calculate aspect ratio, resize dimensions, and convert between formats.

Add, subtract, multiply matrices and calculate determinants and transposes.

Calculate logarithms with any base including natural log and log base 10.

Calculate probability, odds, and complementary probability from events and outcomes.

Calculate permutations P(n,r) and combinations C(n,r) with formulas.

Calculate mean, median, mode, range, and standard deviation from a data set.

Convert numbers between binary, octal, decimal, and hexadecimal.

Count significant figures and round numbers to a specified number of sig figs.

Convert between standard form and scientific notation.

Compute definite integrals numerically using Simpson's rule. Supports polynomials, trig, exp, and log.

Calculate derivatives of polynomial, trigonometric, exponential, and logarithmic functions symbolically.

Evaluate limits of polynomial, rational, and trigonometric expressions as x approaches any value.

Compute Taylor and Maclaurin series expansions for common functions up to N terms.

Add, subtract, multiply, and divide complex numbers. Convert between rectangular and polar forms.

Compute vector addition, subtraction, dot product, cross product, and magnitude for 2D and 3D vectors.

Find eigenvalues and eigenvectors of 2x2 and 3x3 matrices by solving the characteristic polynomial.

Simplify boolean expressions using algebraic rules. Supports AND, OR, NOT, and XOR operations.

Perform addition, subtraction, and multiplication in any number base from 2 to 36.

Compute modular addition, subtraction, multiplication, exponentiation, and modular inverse.

Compute union, intersection, difference, symmetric difference, power set, and cardinality of sets.

Check if a number is prime, find its factors, and see nearest primes.

Generate cryptographically secure random numbers with custom range and count.

Convert between Arabic numbers and Roman numerals bidirectionally.

Calculate percentage decrease between two numbers instantly. Find depreciation rates, weight loss percentages, stock drops, and decline metr...

Calculate percentage increase between two numbers instantly. Find year-over-year growth, salary raises, inflation rates, and investment retu...

Calculate how much you save with any percentage off discount. Find the final price after X% off, compare deals, and avoid double discount tr...

Calculate speed, distance, or time using the fundamental velocity equation.

Calculate force, mass, or acceleration using Newton's second law (F = ma).

Calculate kinetic energy, mass, or velocity using KE = 1/2 mv².

Calculate voltage, current, or resistance using Ohm's law (V = IR).

Calculate range, max height, and flight time for projectile motion.

Calculate the mass of any element given its volume using density data for all 118 elements.

Calculate the volume of any element given its mass using density data for all 118 elements.

Convert between common units of length, weight, temperature, speed, and more.

Calculate your electricity bill from power usage, time, and rate — or solve for any variable.

Look up AWG wire diameter, cross-section area, resistance, and max ampacity.

Convert between decibels and power or voltage ratios, and add dB levels.

Calculate wavelength, frequency, period, or energy of electromagnetic waves.

See how much you would weigh on Mars, Jupiter, the Moon, and other planets.

Decode resistor color bands to find resistance value and tolerance.

Calculate gear ratio, output speed, and torque from driving and driven gear teeth.

Convert between Pa, bar, psi, atm, mmHg, Torr, and other pressure units.

Calculate heat transfer rate through materials using Fourier's Law of conduction.

Calculate spring constant from force and displacement or mass and period.

Calculate image distance, magnification, and image characteristics using the thin lens equation (1/f = 1/do + 1/di).

Calculate the period, frequency, and length of a simple pendulum using T = 2π√(L/g).

Calculate buoyant force, determine if an object floats or sinks, and find the submerged fraction.

Calculate centripetal force, mass, velocity, or radius for circular motion using F = mv²/r.

Calculate the observed frequency shift from source and observer velocities using the Doppler effect formula.

Calculate remaining amount, half-lives elapsed, and activity of a radioactive substance over time.

Calculate electrical power, voltage, current, and resistance using P=IV, P=I²R, and P=V²/R.

Calculate capacitance, charge, energy stored, and series/parallel capacitor combinations.

Calculate inductance, energy stored, time constant, and series/parallel inductor combinations.

Calculate transformer turns ratio, output voltage, and output current from input values and winding turns.

Calculate your Body Mass Index and find out your weight category.

Estimate your daily calorie needs based on your age, weight, height, and activity level.

Estimate your body fat percentage using the U.S. Navy method.

Calculate your estimated due date based on your last menstrual period.

Calculate your Total Daily Energy Expenditure based on activity level.

Calculate your daily protein, carbs, and fat targets based on your goals.

Calculate running or walking pace, time, or distance.

Calculate how much water you should drink daily based on your weight and activity.

Find optimal bedtime or wake-up time based on 90-minute sleep cycles.

Estimate your one-rep max from the weight and reps of a working set.

Convert dog years to human years using the scientifically accurate logarithmic formula.

Track your pregnancy week by week with baby size, development milestones, and symptoms.

Calculate how much food to feed your dog daily based on weight, age, and activity level.

Calculate your ideal weight range using Devine, Robinson, Miller, and Hamwi formulas.

Estimate your blood alcohol concentration based on drinks, weight, and time.

Estimate your conception date and fertile window from due date or last period.

Calculate your 5 heart rate training zones for optimal cardio workouts.

Calculate your daily macros for a ketogenic diet based on your profile and goals.

Plan your intermittent fasting schedule with eating and fasting windows.

Predict your ovulation date, fertile window, and next period.

Check your blood pressure category and get health recommendations.

Calculate your lean body mass and fat mass from body fat or body measurements.

Calculate your Fat-Free Mass Index to evaluate muscular development relative to height.

Estimate your VO2 max using the Cooper 12-minute run or 1.5-mile run test.

Calculate your optimal daily protein intake based on weight, activity level, and fitness goal.

Calculate recommended pregnancy weight gain based on IOM guidelines and pre-pregnancy BMI.

Estimate your BAC and how long until you are sober using the Widmark formula.

Estimate your biological age based on exercise, sleep, diet, stress, and BMI.

Calculate how long caffeine stays in your body and when it's safe to sleep using the 5-hour half-life formula.

Calculate medication dosage by body weight using mg/kg dosing for common medications.

Calculate wheelchair ramp length from height using ADA-compliant 1:12 and commercial 1:16 slope ratios.

Calculate safe noise exposure time at given decibel levels using NIOSH and OSHA standards.

Calculate 5 training pace zones from a race time or threshold pace using the Jack Daniels VDOT system.

Calculate 7 power training zones from your FTP using the Coggan power zone model.

Calculate swim pace per 100m or 100yd and estimate times for various distances from a known time.

Check blood type donor and recipient compatibility for all ABO and Rh blood types.

Calculate your due date from IVF embryo transfer date for 3-day or 5-day embryo transfers.

Estimate your body frame size and ideal weight range from wrist circumference and height.

Calculate BMI for children and teens aged 2-19. Learn about BMI percentiles, CDC growth charts, age-specific interpretation, and when to con...

Calculate BMI specifically interpreted for men. Learn about healthy BMI ranges for males, how muscle mass affects BMI readings, visceral fat...

Calculate BMI specifically interpreted for women. Learn about healthy BMI ranges for females, body composition differences, waist-to-hip rat...

Calculate your daily calorie needs for a muscle-building bulk. Learn about caloric surplus for muscle gain (+250-500 cal), lean bulk vs dirt...

Calculate your ideal calorie deficit for safe, sustainable weight loss. Learn how a 500-1000 calorie daily deficit leads to 1-2 lbs per week...

Convert calories for any food weight to calories per 100g, per ounce, and per gram. Classify food energy density with our free calculator.

Calculate calories per serving from total recipe calories and number of servings. Break down protein, carbs, and fat per serving with our fr...

Calculate your daily calorie needs during pregnancy. Learn about trimester-specific calorie increases (+0/+340/+450), key nutrients, healthy...

Calculate how much protein to eat per meal based on your daily goal and number of meals. Get per-meal targets with min/max recommendations f...

Calculate steps per mile and steps per km from your total steps and distance. Estimate calories burned and stride length with our free calcu...

Calculate exactly how many calories you should eat per day to lose weight at a sustainable rate of 1-2 lbs per week. Includes macros for wei...

Calculate how many gallons of paint you need for a room or surface.

Calculate how much flooring material you need for any room.

Calculate cubic yards of concrete needed for slabs, footings, and columns.

Calculate cubic yards and tons of gravel, mulch, or soil for landscaping.

Calculate the number of posts, rails, and pickets needed for a fence.

Calculate shingles, felt, and nails needed for a roofing project.

Calculate the number of steps, rise, run, and angle for a staircase.

Calculate boards, joists, posts, and screws needed to build a deck.

Calculate rolls of wallpaper needed for a room with pattern repeat waste.

Calculate tiles, grout, and adhesive needed for a floor or wall project.

Calculate board feet and cost for lumber purchases.

Calculate the BTU and tonnage needed to heat or cool a room.

Calculate drywall sheets, joint compound, and tape needed for any room.

Calculate insulation R-value, thickness, quantity, and cost by climate zone.

Calculate plumbing pipe size based on fixture units per UPC standards.

Calculate total electrical load and recommended panel size per NEC standards.

Calculate blocks, cap stones, gravel, and backfill for a retaining wall.

Calculate miter and corner angles for any polygon frame, box, or molding project.

Calculate wood moisture content from wet and oven-dry weights using the standard MC formula.

Calculate tangential and radial wood shrinkage by species as it dries from green to target MC.

Calculate the weight of any wood board or panel by species, dimensions, and quantity.

Calculate how many strips you can rip from a board accounting for saw blade kerf waste.

Calculate stile, rail, and panel dimensions for Shaker-style cabinet doors with tongue-and-groove joinery.

Calculate how many pounds and bags of grout you need for a tile job based on tile size, joint width, and depth.

Calculate square yards of carpet needed for a room including waste and determine whether you will need a seam.

Calculate linear feet of baseboard or trim molding for any room, accounting for door openings, waste, and stick length.

Calculate squares of siding needed for walls and gables, subtracting windows and doors and adding a waste factor.

Calculate linear feet of gutter and number of downspouts needed for your home based on eave lengths and gutter size.

Calculate the right tank size or tankless flow rate for your home based on household size, bathroom count, and peak-hour demand.

Calculate swimming pool volume in gallons and liters for rectangular, round, oval, and kidney-shaped pools.

Estimate the cost of a kitchen remodel by size, tier, custom cabinets, and plumbing/electrical relocation, with a component breakdown.

Estimate the cost of a bathroom remodel by size, tier, new shower, walk-in tub, and plumbing relocation.

Calculate required attic net free area (NFA) per IRC R806.2 for balanced 1:300 or unbalanced 1:150 ventilation, split between soffit and ridge vents.

Calculate how many solar panels fit on your roof, estimated kW capacity, and annual kWh output.

Calculate rebar quantity, spacing, linear feet, and weight for concrete slabs and footings.

Calculate concrete mix ratio of cement, sand, gravel, and water for target PSI strength.

Calculate max beam moment, required section modulus, and recommended beam size for a given span and load.

Calculate window U-value and R-value from glass layers, gap type, and frame material.

Calculate required slope percentage and drop per foot for drainage pipes by diameter.

Calculate number of bricks or blocks needed for a wall from dimensions, unit type, and openings.

Calculate minimum septic tank size from bedrooms, occupants, and daily water usage.

Calculate tons of hot-mix asphalt needed for driveways, parking lots, and roads from length, width, and depth.

Calculate cubic yards of soil to remove for foundations, pools, and trenches, with swell factor for hauling.

Calculate how many pavers you need plus base gravel and sand for a patio, walkway, or driveway.

Calculate board feet for hardwood lumber with quarter-grade thickness notation, plus cubic meters for international buyers.

Calculate rafter length, rise, and plumb-cut angle from building run, roof pitch, and overhang.

Convert between roof pitch (x/12), angle in degrees, and grade percentage for any roof slope.

Calculate how many studs, plates, and headers you need for a framed wall at 16" or 24" on center.

Calculate how many 4x8 or 5x10 plywood sheets you need for subfloors, sheathing, or decking with waste allowance.

Calculate floor joist count, linear feet, board feet, and the maximum IRC span for common sizes and species.

Calculate NEC voltage drop percentage and line loss for any wire run by AWG, amps, distance, and copper or aluminum.

Calculate the NEC maximum number of THWN-2 wires that fit in EMT, IMC, RMC, or PVC conduit by trade size.

Calculate water pressure loss and head loss in PVC, copper, PEX, or steel pipe using the Hazen-Williams equation.

Calculate whole-house heat loss through walls, roof, windows, and floor in BTU/hr and kilowatts.

Calculate round or rectangular duct size from airflow (CFM) and velocity for residential HVAC design.

Calculate required spread footing size from column load and soil bearing capacity for foundations and decks.

Calculate how many tubes of caulk or sealant you need for any joint length, width, and depth.

Calculate linear feet of crown molding or trim needed for a room, accounting for doors, windows, and waste.

Calculate required chimney flue area and round or square ID from appliance BTU rating per NFPA 211.

Whole-house cooling load for AC sizing including solar gain, people, lights, and appliances (Manual J lite).

Derate heat pump BTU capacity at actual outdoor temperature for cold climate and standard air-source heat pumps.

Convert between SEER, SEER2, EER, EER2, HSPF, HSPF2, and COP for heat pumps and air conditioners.

Calculate dehumidifier pints per day from room area and humidity class per AHAM guidelines.

Calculate dew point, wet bulb, humidity ratio, and enthalpy from dry bulb temperature and relative humidity.

Calculate ACH (air changes per hour) from room volume and CFM for ventilation and infiltration design.

Calculate required whole-house mechanical ventilation CFM per ASHRAE 62.2-2022 by floor area and bedrooms.

Calculate actual radiator BTU output at any water temperature and room temperature for hydronic heating systems.

Estimate annual heating cost by fuel type (natural gas, propane, oil, electric, wood) using heat loss and heating degree days.

Calculate total external static pressure for residential HVAC systems from duct friction, fittings, filter, and coil.

Calculate the required generator size in watts and kilowatts from your appliance loads, including motor starting surge.

Look up NEC Table 310.16 ampacity for copper and aluminum wire by AWG, with temperature and bundle derating.

Calculate PEX tube length, loop count, and BTU output for hydronic radiant floor heating by tube spacing and water temperature.

Calculate the number of drywall screws needed for walls and ceilings by sheet count, framing spacing, and installation type.

Calculate BTU/hr required to melt snow on a heated driveway or sidewalk by area and climate zone per ASHRAE 2015.

Calculate required inverter kW and DC-to-AC ratio from solar panel array watts for grid-tied and off-grid PV systems.

Calculate how long a battery (kWh) will run your loads, accounting for inverter efficiency and depth-of-discharge limits.

Calculate price per square meter, price per square foot, and price per acre from total cost and area. Supports both metric and imperial inpu...

Calculate cost per square foot, cost per square meter, and cost per acre from total project cost and area. Essential for construction and re...

Calculate how many yards or meters of fabric you need for a sewing project, with conversions between 45", 54", and 60" widths.

Convert seam allowances between imperial and metric and see cut size vs finished size for any pattern piece.

Calculate cast-on stitches from your gauge swatch and target measurement, or convert between pattern gauge and your actual gauge.

Calculate starting chain and row count for crochet projects based on your gauge swatch and target measurements.

Convert knitting needle sizes between US, UK, and metric, and crochet hook sizes between US letter and millimeter.

Estimate how much yarn you need for knitting or crochet projects by project type, size, and yarn weight.

Calculate quilt backing fabric yardage from quilt top dimensions including the extra overage needed for longarm quilting.

Calculate the cut square size needed to make half-square triangles of a finished size using 2-at-a-time, 4-at-a-time, or 8-at-a-time methods.

Calculate the number and length of fabric binding strips needed to bind a quilt of any size with joined diagonal seams.

Calculate fabric weight in grams per square meter (GSM) from a weighed sample of any size.

Calculate fabric shrinkage percentage from before and after washing measurements and determine the extra fabric to cut.

Calculate the finished size of a cross-stitch design on any Aida count (11, 14, 16, 18, 22) and the fabric size to buy.

Calculate tip amount and total bill, with options to split between people.

Calculate sale price, savings amount, and discount percentage.

Calculate exact age in years, months, and days from a birth date.

Calculate the number of days, weeks, and months between two dates.

Calculate fuel economy in MPG or L/100km from distance and fuel used.

Calculate total fuel cost for a trip based on distance, fuel economy, and gas price.

Calculate your GPA from grades and credit hours.

Convert between cups, tablespoons, teaspoons, milliliters, ounces, and grams.

Convert time between world time zones with offset display.

Convert shoe sizes between US, UK, EU, and CM systems.

Calculate your weighted average grade and letter grade from assignments.

Estimate your monthly electricity bill from appliance wattage and usage.

Estimate the cost of moving based on distance, home size, and extras.

Check password strength, entropy, and estimated crack time.

Calculate screen width, height, and PPI from diagonal size and aspect ratio.

Calculate file download time or required speed from file size and bandwidth.

Compare unit prices of two products to find the better deal.

Generate cryptographically secure random strings with custom length and character options.

Generate cryptographically secure UUID v4 identifiers for databases, APIs, and distributed systems.

Generate SHA-256, SHA-384, SHA-512, and MD5 hash digests from any text input.

Generate HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512 message authentication codes.

Decode and inspect JWT tokens to view header, payload, claims, and expiration status.

Convert between Unix epoch timestamps and human-readable dates in both directions.

Parse cron expressions to see human-readable schedules and next run times.

Build cron expressions visually by selecting minute, hour, day, month, and weekday fields.

Convert colors between HEX, RGB, and HSL formats with WCAG contrast checking.

Pick any color from a visual gradient palette and get HEX, RGB, and HSL codes.

Break any URL into its components: scheme, host, port, path, query parameters, and fragment.

Parse raw HTTP headers and analyze security header coverage with a letter grade.

Calculate network address, broadcast, subnet mask, and usable hosts from IP and CIDR prefix.

Convert between YAML and JSON formats bidirectionally with instant preview.

Convert CSV data to JSON with configurable headers and delimiter options.

Convert XML documents to JSON with attribute and nested element support.

Format and indent SQL queries with keyword uppercasing and clause alignment.

Encode text to HTML entities or decode entities back to plain text.

Minify or beautify JSON, CSS, HTML, and JavaScript code with size comparison.

Escape and unescape text for JSON, URL, HTML, backslash, and Unicode formats.

Convert CSV data to downloadable Excel .xlsx files entirely in the browser.

Upload an Excel .xlsx file and convert it to CSV format with delimiter options.

Convert Markdown to clean HTML with live preview. Supports headings, lists, code blocks, tables, and more.

Convert HTML markup to Markdown syntax. Handles headings, formatting, links, tables, and code blocks.

Convert plain text files to properly formatted, downloadable PDF documents with customizable font size and page layout.

Convert CSV data to a formatted PDF table with headers, alternating row colors, and proper pagination.

Convert Markdown documents to beautifully formatted PDF files with headings, lists, code blocks, and tables.

Convert Excel spreadsheets to formatted PDF tables preserving column structure and data formatting.

Convert Word documents to PDF format preserving headings, paragraphs, lists, and basic formatting.

Generate secure passwords and passphrases with customizable length and character types.

Build Content-Security-Policy headers visually with per-directive source controls.

Convert between numeric and symbolic Unix file permissions with a visual toggle grid.

Search common network ports by number or service name with protocol and category info.

Generate QR codes from any text or URL with instant download.

Encode images to Base64 data URIs for embedding in CSS and HTML.

Build markdown tables visually with an editable grid and instant output.

Convert JSON arrays of objects to CSV format with configurable delimiters.

Generate Nginx server block configurations with SSL, reverse proxy, and caching options.

Generate Dockerfiles for Ruby, Python, Node.js, Go, and Java with multi-stage build support.

Generate .gitignore files by selecting languages, frameworks, editors, and operating systems.

Validate .env files for syntax errors, duplicate keys, and exposed secrets.

Build and test regular expressions with live match highlighting and capture groups.

Analyze CORS response headers and test cross-origin request scenarios.

Decode PEM certificates to view subject, issuer, expiry, SANs, and fingerprints.

Analyze IP addresses for class, private/public status, and optional geolocation lookup.

Query DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA) via DNS-over-HTTPS.

Identify network device manufacturers from MAC address OUI prefixes.

Convert OpenDocument .odt files to Microsoft Word .docx format entirely in the browser.

Convert OpenDocument .odt files to PDF format with headings and paragraphs entirely in the browser.

Convert Microsoft Word .docx files to OpenDocument .odt format for LibreOffice and OpenOffice.

Set a countdown alarm with sound alert and screen flash when time expires.

Set an alarm for a specific time and day with sound alert and screen flash.

Precision stopwatch with millisecond accuracy, lap time recording, and split time tracking.

Focus timer with customizable work and break intervals, auto-transitions, and sound alerts.

Read any text aloud with adjustable voice, speed, pitch, and volume using browser speech synthesis.

Convert temperatures between Celsius, Fahrenheit, and Kelvin scales instantly with formulas shown.

Convert length between mm, cm, m, km, inches, feet, yards, and miles instantly.

Convert weight between mg, g, kg, tonnes, ounces, pounds, and stone instantly.

Convert speed between m/s, km/h, mph, knots, and ft/s instantly.

Convert data sizes between bytes, KB, MB, GB, TB, PB with binary and decimal values.

Convert cups to mL, liters, fluid ounces, tablespoons, and teaspoons instantly.

Convert teaspoons to mL, cups, tablespoons, fluid ounces, and liters instantly.

Convert tablespoons to mL, cups, teaspoons, fluid ounces, and liters instantly.

Convert volume between cubic feet, cubic meters, cubic yards, liters, and gallons.

Generate CSS box-shadow code visually with live preview, multiple shadows, and inset support.

Build CSS Flexbox layouts visually with live preview of flex-direction, justify-content, align-items, and gap.

Convert pixels to REM, EM, PT, and percentage with customizable base font size and quick reference table.

Generate HTML meta tags for SEO, Open Graph, and Twitter Card with character count indicators.

Create favicons from text initials with custom colors and shape. Download all sizes as PNG.

Generate valid JSON-LD schema markup for articles, products, FAQs, local businesses, events, and recipes.

Analyze keyword density, word frequency, bigrams, and trigrams to optimize content for SEO.

Check if a number is prime, find its factorization, nearest primes, and prime index.

Generate random numbers within any range with unique mode, sorting, and statistics.

Resize images in your browser with aspect ratio lock, quality control, and format conversion to PNG, JPEG, or WebP.

Translate text to Morse code and Morse code to text with audio playback of dots and dashes.

Convert numbers to Roman numerals and Roman numerals to numbers for values 1-3999.

Generate realistic fake data for testing with 16 field types. Export as JSON or CSV.

Generate barcodes in Code 128, EAN-13, and Code 39 formats with SVG and PNG download.

Complete HTTP status code reference with search and category filtering across all 1xx-5xx codes.

Preview how your page looks when shared on Facebook and Twitter with live OG tag editing.

Convert cURL commands to Python, JavaScript, Ruby, and PHP code instantly.

Convert JSON data to clean, readable YAML format with size comparison and key count analysis.

Generate TypeScript interface definitions from JSON data with automatic type inference and nested object support.

Format, beautify, and minify HTML code with proper indentation, tag counting, and size analysis.

Format, beautify, and minify CSS stylesheets with rule counting, selector analysis, and size comparison.

Format, beautify, and minify JavaScript code with function counting, line analysis, and size comparison.

Convert HTML to JSX for React. Automatically converts class to className, for to htmlFor, self-closes void elements, and transforms inline styles.

Generate and test robots.txt files online. Create crawler rules, add sitemaps, and test if URLs are allowed or blocked.

Convert SVG to PNG images online using the browser Canvas API. Adjust scale and download the result.

Encode and decode text to Base64 online. Supports standard and URL-safe Base64 encoding with instant results.

Encode and decode URLs online. Convert special characters to percent-encoded format for safe use in web addresses.

Convert between hexadecimal and ASCII text. View hex, binary, and decimal representations with multiple output formats.

Track daily calorie intake by time of day. Log meals, view daily summaries, and browse history.

Split the bill evenly among friends with tip and tax included.

Plan your wedding budget with a detailed cost breakdown by category.

Plan your trip budget with daily and total cost estimates by category.

Estimate the true cost of owning a dog or cat with lifetime expense breakdowns.

Calculate electricity usage and cost for each appliance with monthly breakdowns.

Track all your subscriptions and see the total monthly and annual cost.

Generate JSON Web Tokens with custom payloads and HMAC-SHA256 signatures.

Calculate P50, P90, P95, P99 percentiles from API response time data.

Estimate PostgreSQL table sizes based on column types and row counts.

Encrypt and decrypt text using AES-256-GCM with PBKDF2 key derivation.

Calculate uptime percentage, nines classification, and allowed downtime per SLA.

Generate citations in APA 7th, MLA 9th, and Chicago formats for books, journals, and websites.

Compare two texts for similarity using 3-gram Jaccard analysis.

Calculate the grade you need on your final exam to achieve your desired course grade.

Plan your college budget by calculating total costs, financial aid, and funding gaps.

Plan your weekly study schedule based on course credits and difficulty levels.

Side-by-side text diff comparison tool showing additions, deletions, and unchanged lines.

Generate lorem ipsum placeholder text by paragraphs, sentences, or words with classic opening and HTML output.

Convert SQL queries to MongoDB query syntax with explanations.

Convert Tailwind utility classes to equivalent plain CSS properties.

Build GraphQL queries visually from type, fields, and arguments.

Calculate requests per second, daily quota usage, and time until reset.

Generate docker-compose.yml from service selections like PostgreSQL, Redis, Nginx.

Generate conventional commit messages from type, scope, and description.

Calculate the next semantic version from current version and change type.

Check WCAG 2.1 AA/AAA contrast ratio between foreground and background colors.

Generate HTML email signatures from name, title, company, and contact info.

Find overlapping business hours across multiple timezones.

Estimate annual CO2 footprint from driving, electricity, flights, and diet.

Create invoices with line items, tax calculation, and downloadable text output.

Generate .htaccess rules for Apache servers. HTTPS redirects, compression, caching, security headers, and more.

Calculate the right tip for your bartender instantly. Whether tipping per drink or on a full tab, adjust tip percentage and split the bill —...

Calculate business days between two dates. See weekdays, weekend days, and calendar days. Excludes Saturdays and Sundays automatically for a...

Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case. Free online text case converter with...

Count characters, letters, digits, special characters, lines, and words in any text. Get detailed character analysis with this free online c...

Calculate the final price on clearance items after additional markdowns. See your savings from clearance discounts and compare deals — free...

Calculate cost per day, per week, per month, and per year from any total cost and time period. Perfect for subscriptions, rentals, and vacat...

Calculate cost per hour and cost per minute from any total cost and time period. Ideal for parking, rentals, freelance services, and hourly...

Calculate the cost per kilometer and cost per mile of driving. Enter distance, fuel used, and fuel price to find your exact driving costs in...

Calculate vehicle cost per mile from fuel, insurance, maintenance, and depreciation costs. See per-mile, per-km, and annual cost breakdowns...

Calculate printing cost per page from cartridge price and page yield. Estimate monthly and yearly printing costs with pages per month projec...

Split any cost evenly among a group. Enter total cost, number of people, and optional tip and tax to calculate each person's share instantly...

Calculate the cost per serving for any recipe. Enter total ingredient cost and number of servings, with optional markup for selling price an...

Calculate the cost per wear for any clothing item or accessory. Compare against a cheaper alternative to find which is the better value over...

Calculate your savings from coupon discounts instantly. See the final price after applying a coupon or find the coupon percentage between tw...

Calculate your data plan's cost per GB, overage charges, unused data value, and effective cost. Optimize your mobile data plan spending.

Calculate how many days, weeks, months, hours, and minutes until any date. See business days remaining and countdown to events, deadlines, a...

Calculate the right tip for food delivery, pizza delivery, or grocery delivery instantly. Adjust tip percentage and split the cost — free an...

Calculate the fuel cost for any trip. Enter distance, fuel efficiency (MPG or L/100km), and fuel price to find trip cost, fuel needed, and c...

Calculate the right tip for your hairstylist, colorist, or spa service instantly. Adjust tip percentage and split between multiple services...

Format, prettify, minify, and validate JSON instantly. See key count, nesting depth, and data type. Free online JSON formatter with copy but...

Validate JSON data online. Check syntax, view structure analysis with key count, nesting depth, and formatted output.

Write markdown and see a live HTML preview. Supports headings, bold, italic, links, lists, code blocks, and more. Free online markdown previ...

Calculate price per liter, per mL, per gallon, and per fluid ounce from any volume and price. Supports liters, milliliters, gallons, and flu...

Compare prices per kilogram, per pound, per 100g, and per gram. Enter any product price and weight to find the best value instantly.

Test regular expressions with live match highlighting, match count, and capture group display. Free online regex tester with global, case-in...

Convert regular expressions to plain English explanations. Understand what each part of a regex pattern means.

Remove duplicate lines from text instantly. See unique line count, duplicates removed, and get clean deduplicated output. Free online duplic...

Calculate rent per square meter, per square foot, and annual cost. Compare rental value across different apartments and spaces instantly.

Calculate the perfect restaurant tip instantly. Adjust tip percentage for dine-in, buffet, or takeout and split the bill among your group —...

Calculate the final sale price after any discount percentage. See your savings instantly and compare deals — free and easy to use.

Calculate shift duration from start and end times. Handles overnight shifts, break deductions, and shows total hours, paid hours, and minute...

Encode and decode text with Base64, URL encoding, and HTML entities. Convert text instantly with this free online string encoder and decoder...

Compare two texts side by side with line-by-line diff highlighting. See additions, removals, and unchanged lines. Free online text compariso...

Calculate hours worked and gross pay from clock-in and clock-out times. Deduct breaks, enter your hourly rate, and see daily and weekly pay...

Count words, characters, sentences, paragraphs, and estimate reading and speaking time. Paste your text for instant results with this free w...

Calculate your typing or reading speed in words per minute. Enter word count and time to get WPM, plus time estimates for common document le...

Calculate required work breaks based on shift length. See rest breaks, meal breaks, total break time, net work time, and a detailed break sc...

Calculate total work hours between two dates. Enter start date, end date, hours per day, and days per week to get total work hours, work day...

Convert kilowatt-hours to electricity cost. Enter your kWh usage and rate to see daily, monthly, and yearly electricity costs instantly.

Calculate alcohol by volume (ABV) for beer, wine, mead, and cider from original and final gravity readings.

Calculate International Bitterness Units (IBU) for your beer recipe using the Tinseth hop utilization formula.

Estimate beer color in SRM (Standard Reference Method) and EBC from the malt bill using the Morey equation.

Calculate the strike water temperature needed to hit a target mash temperature based on grain weight and ratio.

Correct your hydrometer gravity reading for sample temperature when it differs from the calibration temperature.

Convert refractometer Brix readings to specific gravity, including post-fermentation correction with wort correction factor.

Calculate the yeast cells needed and number of dry yeast packs or starter size for a healthy fermentation.

Calculate priming sugar for bottle conditioning beer to your target carbonation level using corn sugar, table sugar, or DME.

Find the regulator PSI needed to force carbonate your keg to the target volumes of CO2 at your serving temperature.

Calculate the water to add for diluting high-proof spirits to a target bottling proof, using the Pearson square method.

Calculate the final alcohol by volume of any cocktail from up to four ingredients, including dilution from ice and stirring.

Calculate bar pour cost percentage, profit margin, and gross profit per drink from bottle cost, pour size, and sale price.

Calculate the great-circle distance between two latitude/longitude coordinates in kilometers, miles, and nautical miles using the Haversine formula.

Convert coordinates between decimal degrees and degrees-minutes-seconds (DMS) formats in both directions, with hemisphere support.

Calculate the initial compass bearing and back bearing between two latitude/longitude points in degrees and compass direction.

Calculate the great-circle midpoint between two latitude/longitude coordinates for route planning and meet-in-the-middle trips.

Convert map distance to real-world distance using map scale ratios like 1:50,000 or 1:25,000 with meters, kilometers, miles, and feet output.

Calculate population density per square kilometer and square mile from population and area, with density classification from rural to hyperdense.

Find the destination latitude/longitude from a start coordinate, an initial bearing, and a distance using the great-circle formula.

Find the point on the exact opposite side of the Earth from any latitude/longitude. Discover what is on the other side of the world if you dug straight down.

Calculate rhumb line (constant bearing) distance and bearing between two latitude/longitude coordinates, used in traditional maritime navigation.

Calculate the area and perimeter of a polygon defined by latitude/longitude vertices using spherical geometry. Returns km², mi², hectares, and acres.

Estimate hiking time from distance, ascent, and descent using Naismith's rule with fitness level adjustments for trip planning.

Encode latitude and longitude into a GeoHash string, or decode a GeoHash back to coordinates and bounding box. Supports precision 1 to 12.

Convert degrees of latitude and longitude to kilometers and miles at any given latitude. Essential reference for GPS precision and mapping work.

Estimate flight duration from coordinates or distance with aircraft cruise speeds and taxi time. Useful for travelers and pilots.

Calculate how much mulch you need for a garden bed or landscape area, in cubic yards, cubic feet, and 2 cu ft bags.

Estimate topsoil needed for a lawn, garden bed, or planter in cubic yards, cubic feet, and 40 lb bags, based on area and depth.

Calculate how much soil, compost, and aeration your raised bed needs, with Mel's Mix ratios and bag/yard output for any size and number of beds.

Work out how much finished compost you need to amend a garden bed at a given depth, in cubic yards, pounds, and 1 cu ft bags.

Convert an N-P-K ratio and application rate into pounds of fertilizer to apply to a lawn or garden of any size.

Calculate how much grass seed to buy for new lawns or overseeding, with species-specific application rates for cool and warm season grasses.

Estimate gallons and liters of water your lawn needs each week from its square footage and the desired watering depth in inches.

Calculate how many plants fit in a garden bed using square or triangular spacing patterns, based on bed dimensions and desired spacing.

Calculate growing degree days (GDD) from daily max/min temperatures and a base temperature to predict crop and pest development stages.

Estimate a tree's age from its trunk circumference using ISA growth factors for oak, maple, pine, walnut, and other common species.

Calculate the BTU/hour and wattage of greenhouse heater you need based on greenhouse size, glazing type, and temperature delta.

Calculate the carbon-to-nitrogen ratio of a compost pile from brown and green material weights, with feedback on how to balance your pile.

Calculate love compatibility between two people using name numerology with a percentage score.

Check astrological compatibility between any two zodiac signs with a love, friendship, and overall score.

Calculate the age difference between two people in years, months, and days with a half-plus-seven check.

Fun estimator for when you'll meet someone new based on dating effort, city size, and selectivity.

Classic FLAMES name game — find out if you're Friends, Lovers, Affectionate, Married, Enemies, or Siblings.

Plan your wedding budget with a 10-category breakdown and per-guest cost analysis — venue, catering, attire, flowers, photography, and more.

Split wedding costs between the couple and families using traditional or modern allocations.

Calculate how much to save each month to reach your honeymoon budget by your wedding date.

Calculate an engagement ring budget based on salary using the 1, 2, or 3 month rules — with alternatives.

Estimate the total cost of raising a child from birth to 18 based on income, cost of living, and number of kids.

Calculate a monthly date night budget covering dinner, activity, and extras, and see how many dates you can afford.

Calculate how long you've been together in years, months, and days, plus a countdown to your next anniversary.

Track how long you've been dating in years, months, weeks, days, hours, and minutes from your first date.

Countdown to your wedding day in days, weeks, months, hours, and minutes — plus a planning checkpoint timeline.

See which relationship milestones you've passed based on how long you've been together and average timelines.

Estimate how long it will take to recover from a breakup based on relationship length and emotional factors.

Estimate the total cost of divorce including attorney fees, filing, mediation, and contested vs uncontested paths.

Estimate monthly spousal support payments from income difference and length of marriage using general formulas.

Estimate monthly child support using the income shares model from both parents' income and number of children.

Estimate how many eligible singles match your preferences in your city using demographic filters.

Find the socially acceptable dating age range for any age using the classic 'half your age plus seven' rule.

Calculate your online dating return on investment in hours, messages, and dates to find a relationship.

Calculate depth of field, near/far focus limits, and hyperfocal distance from focal length, aperture, subject distance, and sensor size.

Calculate equivalent exposures by changing ISO, aperture, or shutter speed while maintaining the same exposure value.

Calculate print dimensions from pixel dimensions and DPI, or find the required pixels for a target print size.

Estimate video file size from bitrate, duration, frame rate, codec, and audio bitrate for any resolution.

Calculate crop dimensions to fit a target aspect ratio from your original image dimensions with pixel-level precision.

Calculate golden hour, blue hour, sunrise, and sunset times from latitude, longitude, and date for perfect natural lighting.

Calculate shooting interval, total shots, and final video duration for time-lapse photography with storage estimates.

Estimate storage needs from number of photos, file format (RAW, JPEG, TIFF, HEIF), and camera megapixels.

Estimate savings under PSLF and IDR forgiveness programs based on income, loan balance, and payment plan.

Compare total 4-year cost of two colleges including tuition, room, board, fees, and financial aid.

Calculate hourly return on time spent applying for scholarships versus working a part-time job.

Detect time conflicts and gaps in a weekly class schedule to optimize your college timetable.

Estimate word count from page count based on font, spacing, margins, and font size.

Calculate transferable credits, remaining credits, and estimated time and cost savings.

Project 529 plan growth with tax-free earnings and state tax deductions over time.

Convert your cat's age to human years using the veterinary-standard formula accounting for rapid early maturation.

Calculate daily calories and food portions for your cat based on weight, age, activity level, and indoor/outdoor lifestyle.

Calculate aquarium volume, fish stocking capacity, filter requirements, and heater size for any tank shape.

Compare pet insurance premiums vs estimated vet bills over your pet's lifetime to see if coverage is worth it.

Calculate safe medication doses for dogs and cats by weight for common OTC medications and supplements.

Predict your puppy's adult weight from current weight and age using breed-specific growth curves for toy to giant breeds.

Calculate daily hay, grain, salt, mineral supplement, and water requirements for horses based on weight and activity level.

Scale any recipe up or down by adjusting the number of servings. Instantly calculate exact ingredient amounts.

Calculate substitution amounts for common baking ingredients: butter, oil, flour types, sugar types, and egg substitutes.

Calculate flour, water, starter, and salt amounts for sourdough bread using baker's percentages.

Estimate cooking time for beef, pork, chicken, turkey, and lamb by cut, weight, doneness, and cooking method.

Calculate BBQ smoking time by meat type, weight, and smoker temperature with stall estimates and rest times.

Calculate exact flour, water, salt, yeast, and oil amounts for pizza dough by number, size, and hydration.

Adjust canning processing time and pressure for your altitude following USDA guidelines.

Look up recommended freezer storage times for meat, poultry, seafood, dairy, bread, fruits, and prepared foods.

Calculate the true cost per serving for your meal prep with ingredient-by-ingredient cost breakdown.

Calculate total and per-serving calories, protein, carbs, and fat for any recipe with macro percentage breakdown.

Calculate your vehicle's miles per gallon from distance traveled and fuel used. Supports imperial and metric.

Calculate how much your car depreciates each year using the declining balance method with a year-by-year schedule.

Compare two tire sizes side by side for diameter, circumference, sidewall height, and speedometer difference.

Estimate your vehicle's 0-60 mph time, quarter mile time, and trap speed from horsepower and weight.

Calculate engine horsepower from torque and RPM, or torque from HP and RPM. Includes kW and Nm conversions.

Calculate when your next oil change is due based on oil type, mileage, and driving conditions.

Calculate the true total cost of owning a vehicle including loan, insurance, fuel, maintenance, and registration.

Calculate your vehicle's safe towing weight from GVWR, curb weight, payload, and tongue weight percentage.

Estimate your electric vehicle's real-world range based on battery size, efficiency, speed, and temperature.

Calculate the cost to charge your EV at home or public chargers with energy, time, and cost per mile.

Compare annual and total costs of owning an EV versus a gas car including fuel, maintenance, and CO2 emissions.