Compost Calculator
Estimate compost volume, bag quantity, bulk weight, settling allowance and bagged-versus-bulk cost for garden beds.
Default project preview
1.36 yd³
Compost bags
19
Base volume
1.23 yd³
Bed area
200 ft²
Bulk weight
1,467 lb
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Volume = bed length × width × depth × bed count. Settling allowance is applied before converting to bulk units or dividing by bag volume.
FAQ
Compost Calculator questions
How deep should compost be applied?+
The right depth depends on whether compost is top-dressed, incorporated or used in a new bed. More is not always better.
Why can compost weight vary so much?+
Moisture, feedstock, particle size and decomposition level strongly affect bulk density.
Is compost the same as topsoil?+
No. Compost is organic amendment, while topsoil is mineral soil. Many projects use them differently or in a blend.