Cubic Yards Calculator
Work out cubic yards of concrete, gravel or mulch needed for your project with this free cubic yards calculator in your browser.
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Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter length and width in feet and the depth in inches.
- Read the cubic yards needed.
How it works
Cubic yards = length(ft) × width(ft) × depth(ft) ÷ 27. The tool converts the depth from inches for you.
Worked example
10 ft × 10 ft × 4 in. ≈ 1.23 cubic yards.
Common mistakes
- Leaving the depth in inches in the formula — it must be converted to feet (÷ 12).
- Ordering exactly — add ~10% for compaction and spillage.
Frequently asked questions
How do I calculate cubic yards?
Multiply length, width and depth in feet, then divide by 27, since there are 27 cubic feet in a cubic yard.
When are cubic yards used?
They are the standard unit for ordering concrete, soil, mulch and aggregate in the US; elsewhere cubic metres are used.
How many cubic feet in a cubic yard?
27 — a yard is 3 feet, and 3 × 3 × 3 = 27.
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Cite this tool
Zerdly. (2026). Cubic Yards Calculator. Retrieved from https://www.zerdly.com/tools/cubic-yards-calculator/
Tip: Enter any known values to calculate the remaining results.
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