Compost Calculator
Estimate compost volume, cubic yards, bag count, bulk cost, weight, and practical application depth for gardens, lawns, and raised beds.
Inputs and method
Enter area dimensions, application depth, bag volume, waste allowance, and optional bag price, bulk price, or bulk density. Volume is area × depth; waste is applied once before dividing by bag yield and rounding up to whole bags. Weight and costs appear only when their assumptions are entered.
Calculations retain full floating-point precision until the labeled display step. Counts and packages use an explicit upward ceiling only where a whole purchase unit is required.
Interpreting the estimate
Use the result as a planning value and keep input precision consistent with the measurements or source data you have. Small displayed differences can come from final-place rounding; intermediate values are not rounded.
Assumptions and limits
Bag yield, density, moisture, settling, and delivered volume vary. Enter package or supplier values; the calculator does not assume a universal density or price.
Rejecting empty, invalid numeric, prohibited negative, zero-denominator, impossible, or unsupported inputs prevents the page from presenting a misleading numeric result.