Measure the length, width, and height of the space in feet
Multiply length × width × height to get cubic feet
Divide the cubic feet by 27 to convert to cubic yards
Use the formula: cubic yards = (length × width × height) ÷ 27
For irregular shapes, break the area into smaller rectangular sections and calculate each one separately
Add the cubic yards from each section together
Make sure all measurements use the same unit before converting
Round the final result as needed for your project