To calculate cubic yards, multiply length × width × depth using consistent units. Convert the result to cubic feet, then divide by 27 because one cubic yard contains 27 cubic feet.
Convert depth correctly
Project depth is often measured in inches. Divide inches by 12 before multiplying by dimensions measured in feet. The Cubic Yard Calculator handles this conversion automatically.
Should you add extra material?
A small waste allowance can help with uneven ground, spillage, compaction and ordering increments. The appropriate allowance depends on the material and project.
Concrete, gravel and mulch use the same volume idea
The volume formula is similar, but the practical ordering method differs. Concrete may be ordered by cubic yard, gravel may be sold by the ton and mulch may be sold by cubic yard or bag.
Use a material-specific calculator when possible
For concrete, use the Concrete Calculator. For stone, use the Gravel Calculator, which estimates both cubic yards and tons.