Gardening & Landscaping Calculators

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.