Measure the length, width, and height in feet
Multiply length × width × height to get cubic feet
Divide the cubic feet by 27 to get cubic yards
Use the formula: cubic yards = (length × width × height) ÷ 27
For flat areas, multiply length × width × depth, then divide by 27
For irregular shapes, break the space into smaller sections and add the cubic yards together
Convert inches to feet before calculating if measurements are not already in feet
Round the final answer to the nearest practical decimal if needed