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.

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 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.

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 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 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 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 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.