Garden Calculators
Soil volume, planting and yard math: free calculators that show the formula.
Raised Garden Bed Calculator
Soil for a raised bed by size and depth, split into topsoil and compost, with bags, cost and the boards for the walls.
Use Calculator →Vegetable Planting Calendar Calculator
When to start seeds, transplant and sow common vegetables, by US Department of Agriculture (USDA) hardiness zone, using typical last-frost dates for each zone.
Use Calculator →Garden Soil Calculator
Topsoil, compost or mulch for beds, lawns and pots, in cubic yards or liters, with a settling allowance, bag count, cost and weight.
Use Calculator →Plant Spacing Calculator
How many plants fit your bed, worked out from length, width and spacing, with presets for eight vegetables and a custom entry.
Use Calculator →Garden Watering Calculator
How many gallons of water your garden or lawn needs per week, worked out from area, plant type, soil and climate using Cooperative Extension guidelines.
Use Calculator →Compost Calculator
How much compost to buy for a bed, lawn or pot, plus a browns to greens check, a carbon to nitrogen ratio, and guidance on bin size and compost weight.
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