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Compost Calculator — Cubic Yards, Bags, Weight & Cost

Editable live calculator

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No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Length (ft) Width (ft) Depth (in) Identical areas Settling / order allowance (%) Bag volume (ft³) Use the volume printed on the bag.Bulk density (lb/yd³, optional) Editable: moisture and material change weight.Price per bag (optional)

Calculated result

1.358 yd³ · 49 bags

36.67 ft³ order volume

1.49 short tons at entered density

Bag price not entered

Show the working

1. 20 × 10 × (2 ÷ 12) × 1 = 33.33 ft³ before allowance.
2. Apply 10% allowance = 36.67 ft³ = 1.358 yd³.
3. Bags = ceil(36.67 ÷ 0.75) = 49.

Compost density, settling and package volume vary by product and moisture. Use supplier values for purchasing.

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