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The free garden toolkit

Soil & bag calculator

Turn bed dimensions into cubic feet, cubic yards, and a bag count.

32 cubic feet

1.19 cubic yards · 906.14 litres

16 bags at 2 cubic feet each, including your 0% allowance.

Formula: length × width × depth ÷ 12. Bag counts round up after adding your allowance. This assumes a rectangular area. Depth is your input, not a crop recommendation. Subtract existing fill before measuring your required depth. Soil settling and supplier measurements vary; this tool estimates quantity, not soil composition.

Free to use. No account required. Your entries are processed in your browser and reset when you leave this page.

Keep your plan grounded.

Use the result as a starting point. Crop spacing, fill depth, sowing windows, and care needs depend on the crop and your conditions. University of Maryland Extension’s beginner guidance is a useful companion.

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