Material buying guide
How to Calculate Cubic Yards for Project Materials
Cubic yards are the common language for bulk materials, but most projects start with a tape measure and a depth target. This guide shows how to move from field measurements to a supplier-ready volume.
Reviewed for estimating assumptions on May 21, 2026.
The basic conversion
Measure length and width in feet. Convert depth or thickness to feet. Multiply length by width by depth to get cubic feet, then divide by 27 to get cubic yards.
For example, 12 ft x 10 ft x 0.5 ft equals 60 cubic feet. Divide by 27 and the result is 2.22 cubic yards before waste or rounding.
Why depth drives the order
A small depth change can move the order by more than a few bags. A 200 sq ft area at 2 inches deep is about 1.23 cubic yards, while the same area at 4 inches deep is about 2.47 cubic yards.
How to round the result
Round to the unit your supplier sells. Some landscape yards sell by the quarter yard, some by the half yard, and some have a one-yard delivery minimum.
Use the material-specific calculators when the supplier quotes by ton, bag, box, gallon, sheet, or board instead of cubic yards.