CalcCommonsHow to use
Choose rectangle, circle, or known area. Rectangle uses length and width; circle uses diameter; known area uses square units of your chosen length unit. Enter depth with its separate unit selector and calculate the volume.
For related tasks, try the Gravel Calculator.
Formula & how it works
Rectangular volume = length × width × depth. Circular volume = π × (diameter/2)² × depth. Known-area volume = area × depth. Cubic yards = cubic feet/27.
Worked example
Example 1
A 200 sq ft area covered 3 inches deep has 200 × 0.25 = 50 ft³, or 50/27 = 1.8519 yd³.
Assumptions & practical notes
The depth unit is independent of the length unit. In known-area mode, feet means square feet and meters means square meters.
This is geometric volume with no waste. Use Gravel, Mulch, or Concrete for material-specific allowances.
See our calculation methodology for unit definitions and testing practices.
Results are estimates for planning purposes. Verify measurements, product specifications, and applicable building codes before purchasing materials or starting work.
Frequently asked questions
How many cubic feet are in a cubic yard?
27, because a yard is 3 feet and 3 × 3 × 3 = 27.
Can I convert square yards directly to cubic yards?
Only when you also know the depth in compatible units.
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