The general “how many cubic yards of material do I need” question for mulch, gravel, topsoil, and other bulk materials sold by the yard.
How it works
The area in square feet is multiplied by the depth (converted from inches to feet), giving cubic feet, then divided by 27 (cubic feet per cubic yard) to get cubic yards.
What this does not include
This does not include a waste margin or bag-count breakdown specific to concrete — for that, use this site’s concrete calculator instead. This tool is a general-purpose area-times-depth conversion.
How to use this calculator
- Enter the area and the desired depth in inches.
Frequently asked questions
Why is a cubic yard exactly 27 cubic feet?
A yard is exactly 3 feet, so a cubic yard (3 feet on each side) is 3 × 3 × 3 = 27 cubic feet.
Is this the same as the site’s concrete calculator?
Same underlying area-times-depth math, but this version is material-agnostic (mulch, gravel, topsoil) rather than specifically framed around concrete ordering and bag counts.
Should I order extra material beyond this exact calculation?
Many suppliers and contractors round up slightly to cover settling and uneven spreading — this calculator gives the exact theoretical volume needed.
