Raised Bed Soil Calculator
Find the exact cubic feet of soil mix your bed needs.
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Tools & Calculators
Every tool in one place. Search or pick a category, then start doing the math.
Soil & Raised Beds
Soil volume, blends, bed dimensions and drainage.
Popular New Compost Ratio Calculator
Dial in the ideal green-to-brown compost balance.
Use ToolMulch Depth Calculator
Bags of mulch needed for any area at any depth.
Use ToolNew Topsoil Calculator
Cubic yards or bags of topsoil for beds, lawns and grading.
Use ToolNew Potting Mix Recipe Calculator
DIY potting-mix and raised-bed blend volumes and cost from any recipe ratio.
Use ToolNew Sheet Mulch / Lawn-Conversion Calculator
Cardboard, compost, mulch and water needed to kill a lawn and build a bed in place.
Use ToolNew Raised Bed Hoop & Fabric Fit
PVC hoop count, pipe length and row-cover fabric for a raised bed high tunnel.
Use ToolNew Soil Amendment Calculator
Pounds and bags of compost, manure, peat or biochar to amend a given area.
Use ToolNew Compost Top-Dressing Calculator
How many cubic feet, yards, bags or tons of compost to top-dress a bed or lawn to a set depth.
Use ToolNew Bulk vs Bagged Material Calculator
Compare the real cost of buying compost, mulch or soil by the bag versus a delivered bulk yard.
Use ToolNew Pot & Container Volume Calculator
How much soil a pot holds in gallons and liters, and how many containers one bag or yard fills.
Use ToolNew Cover Crop Seed Calculator
Pounds of cover-crop seed for your area by crop, the bags to buy, the cost, and coverage per bag.
Use ToolNew Raised Bed Lumber Calculator
Board feet and lumber cost for a raised bed frame by wood type, from length, width, height and thickness.
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Plant Spacing
Square-foot layouts and companion spacing.
Popular Plant Spacing Planner
Fit the right number of plants in every square foot.
Use ToolNew Hedge Planting Calculator
How many shrubs or trees you need for a hedge — single or staggered double row.
Use ToolNew Flower Bed Planner
Plant count, bed area, edging length and mulch volume for a flower bed.
Use ToolNew Tree Staking Material Calculator
How many stakes, how long, and what ties and cost to stake a newly planted tree.
Use ToolNew Trees Per Acre Calculator
How many trees, vines or shrubs fit an acre at a spacing, by square or triangular arrangement, and the cost.
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Watering & Irrigation
Drip flow rates, run times and rainwater catchment.
Watering Needs Calculator
How many gallons your garden bed needs each week.
Use ToolNew Drip Irrigation Planner
Emitters, zone flow and weekly run time for drip lines.
Use ToolNew Rainwater Harvesting Calculator
Gallons your roof harvests per rain inch, and barrels needed.
Use ToolNew Bucket Test Flow Calculator
Measure your spigot's real GPM with a bucket and a stopwatch, then size a drip zone.
Use ToolNew Vacation Watering Calculator
Will your plants survive the trip? Size a reservoir, mulch credit and ollas against days away.
Use ToolNew Rain Barrel Deck Load Check
Is a full rain barrel safe on your deck, balcony or patio? PSF vs surface capacity.
Use ToolNew Soaker Hose Run Time Calculator
How long to run a soaker hose to apply a target depth of water to a bed.
Use ToolNew Sprinkler Application Rate Calculator
How many inches per hour your sprinkler delivers and how long to run it for a target depth.
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Fertilizer & Nutrients
NPK, soil pH and organic dosing calculators.
Fertilizer NPK Calculator
Turn a soil test into pounds of nutrients per bed.
Use ToolNew Compost Bin Size Calculator
How big a compost bin you need, in cubic feet, from your kitchen scraps and yard waste.
Use ToolNew Nitrogen Fertilizer Calculator
How many pounds of a nitrogen fertilizer to apply to hit your target nitrogen rate for an area.
Use ToolNew Spray Tank Mixing Calculator
How much product and water to load a sprayer for an area, and how many tankfuls the job takes.
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Planning & Yield
Season planners, succession sowing and harvest math.
Popular Frost Date Calculator
First & last frost dates for your hardiness zone.
Use ToolGarden Yield Estimator
Predict your harvest from your planting plan.
Use ToolNew Feed a Family Planner
Work backwards from your household to the rows and bed size each crop needs.
Use ToolNew Greenhouse Sizing Calculator
Size a greenhouse or high tunnel: grow area, heating load and the ventilation CFM the glazing demands.
Use ToolNew Garden Area Calculator
Square footage of a rectangle, triangle, circle or oval bed, plus the soil, mulch and plant counts that follow.
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Indoor & Hydroponics
Grow light, nutrient solution and reservoir sizing.
New EC ↔ PPM Converter
Convert nutrient EC to ppm across 442, 500 and 700 scales.
Use ToolNew Grow Light DLI Calculator
Daily light integral from PPFD and hours — and the runtime or intensity a crop needs.
Use ToolNew Grow Tent Circuit Breaker Calculator
How many grow lights, fans and pumps safely fit on a 15 A or 20 A circuit.
Use ToolNew Extension Cord Voltage Drop Calculator
Voltage lost along a garden or grow-room extension cord, by gauge, length and amps.
Use ToolNew Grow Light Run Cost Calculator
Monthly and yearly electricity cost to run a grow light, by watts, hours and rate.
Use ToolNew Grow Room Fan CFM Calculator
Exhaust fan size in CFM to exchange a grow tent or room's air on schedule.
Use ToolNew Hydroponic Reservoir Size Calculator
How many gallons of reservoir your hydroponic plants need, by crop and count.
Use ToolNew Nutrient Dose Calculator
How many mL of stock solution to dose a hydroponic reservoir up to your target ppm.
Use ToolNew Reservoir Correction Calculator
Fix a hydroponic reservoir already mixed: how much stock to raise it, or water to lower it, to a target ppm.
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Lawn & Turf
Seed rates, sod counts and sprinkler run times.
New Grass Seed Calculator
Pounds of seed for seeding or overseeding any lawn.
Use ToolNew Sprinkler Run Time Calculator
Minutes per session to deliver one inch of water.
Use ToolNew Lawn Sod Calculator
Rolls, pallets and cost of sod for any lawn area, with cutting waste built in.
Use ToolNew Mower Capacity Calculator
How fast a mower covers ground in square feet and acres per hour, and how long your lawn will take.
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Seeds & Propagation
Germination tests, sowing density and potting mixes.
New Seed Germination Calculator
Test germination rates and plan how many seeds to sow.
Use ToolNew Potting Soil Calculator
Liters and bags of potting mix for any number of pots.
Use ToolNew Plants Per Square Foot
Square-foot gardening plant counts for any bed size.
Use ToolNew Microgreen Tray Calculator
Seed per tray, expected yield and cost per pound for a microgreen grow.
Use ToolNew Seed Garlic Calculator
Pounds of seed garlic, cloves and bed size for your fall planting.
Use ToolNew Potato Seed Calculator
Pounds of seed potatoes, cut pieces and estimated harvest for your row feet.
Use ToolNew Flower Bulb Spacing Calculator
How many spring bulbs to buy for a bed, by bulb type, area and pack size.
Use ToolNew Seed Packet Coverage Calculator
How many seed packets to buy for a row length, by crop, with cost and seed count.
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Landscaping & Hardscape
Rock tons, pine straw bales and material coverage.
New Landscape Rock Calculator
Tons and cost of rock or gravel for any area and depth, by material density.
Use ToolNew Pine Straw Mulch Calculator
Bales of pine straw or wheat mulch for any bed, by needle length and coverage.
Use ToolNew Straw Bale Garden Planner
Bale counts, urea conditioning and planting sites for a straw bale garden.
Use ToolNew Pond Pump Size Calculator
What pump flow in gallons per hour you need for a garden pond or fountain.
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