Garden & Outdoor calculators
Soil, mulch, grass seed, fertilizer, plant spacing and pools.
36 free tools
Most used
Mulch CalculatorFind how many cubic yards or bags of mulch your beds needPond Volume CalculatorFind how many gallons or liters your garden or koi pond holdsPool Salt CalculatorKnow how many bags of salt bring your saltwater pool to target ppmPool Volume CalculatorFind how many gallons or liters your pool or hot tub holdsTree Height CalculatorMeasure how tall a tree is with its shadow, an angle or a stick
More garden & outdoor tools
Artificial Turf CalculatorPlan turf rolls, seams, infill and base rock for a synthetic lawnDaily Light Integral CalculatorTurn grow-light PPFD and hours into daily light integral (DLI)Drip Irrigation CalculatorSize drip emitters, zones and run times for your plantsFertilizer CalculatorTurn an N-P-K label and target rate into pounds of product to spreadGarden Lime CalculatorEstimate how much lime raises your lawn or garden soil pHGermination Rate CalculatorTest seed viability and know how many seeds to sow for your plant countGrass Seed CalculatorKnow exactly how many pounds of grass seed to buy for your lawnPlant Spacing CalculatorSee how many plants fit in a bed with square or triangular spacingPlanting Schedule CalculatorGet seed-start, planting-out and harvest dates from your frost datesPond Liner Size CalculatorFind the liner and underlayment size to order for your pondPond Pump Size CalculatorSize a pond or waterfall pump by flow, turnover and head heightPool Alkalinity and pH CalculatorDose baking soda, soda ash or muriatic acid to balance alkalinity and pHPool Chlorine CalculatorDose liquid chlorine, bleach or shock to hit your target free chlorinePotting Soil CalculatorWork out how many quarts or liters of potting mix your pots needRaised Bed Soil CalculatorWork out how much soil, compost and mix fills your raised bedsSod CalculatorCount the sod pallets, rolls and cost to cover your lawnSprayer Mix CalculatorTurn a label rate into ounces of concentrate per gallon and per tankSprinkler Run Time CalculatorFind how many minutes to run each zone to apply the water your lawn needsSquare Foot Garden PlannerLay out a square-foot bed and see how many plants fit in each squareTopsoil CalculatorEstimate cubic yards, tons and bags of topsoil or fill dirtVegetable Garden Size CalculatorEstimate how many plants and how much space it takes to feed your householdCompost CalculatorBalance greens and browns for a hot, fast compost pileGreenhouse Heater Size CalculatorSize a greenhouse heater in BTU per hour from area, covering and cold snapsHarvest Date CalculatorPredict when your crops will be ready from planting date and days to maturityHydroponic Nutrient CalculatorConvert EC to ppm on any meter scale and dose nutrients for your reservoirLandscape Edging CalculatorFind how many feet, pieces and stakes of edging your garden beds needLog Board Feet CalculatorScale logs in board feet with the Doyle, Scribner and International ¼" rulesSeed Starting CalculatorKnow when to start seeds indoors and transplant from your frost dateSeeding Rate CalculatorTurn a target plant stand into seeds and pounds per acreTree Age CalculatorEstimate how old a tree is from its trunk circumferenceTrees Per Acre CalculatorCount trees or plants per acre and in total from your planting spacing