Area + Depth Calculator
Enter measurements to get an instant estimate. No sign-up needed.
Geometric volume plus any chosen allowance
A volume-only result. No density assumption is applied. Allowances and costs are estimates; verify supplier units and field conditions.
Why depth is required
A 100-square-foot surface could require very different amounts of material depending on the desired thickness. At 3 inches deep, it needs about 0.93 cubic yards; at 6 inches deep, approximately 1.85 cubic yards.
The formula first converts the depth into a compatible unit and then converts cubic feet into cubic yards.
Common uses
Use area and depth for garden mulch, topsoil spreading, gravel pathways and uniformly thick concrete slabs. Measure the actual footprint rather than estimating from property size.
Measuring irregular areas
Divide a complex area into simpler rectangles or other measurable shapes. Calculate each area, add them together, and apply the specified depth. If depths differ across the site, calculate each section separately.
Frequently Asked Questions
How many cubic yards is 1,000 square feet?
The depth determines the answer. At 3 inches deep, 1,000 square feet is approximately 9.26 cubic yards.
Can square feet be converted directly to cubic yards?
No. You need a thickness or depth because area and volume are different kinds of measurements.
Related Calculators and Guides
Continue with a material-specific estimate, convert units, or review the calculation behind your result.