How the calculation works
Volume = π × radius² × height × number of piers. Use the internal form diameter.
A worked example
Three cylinders at 12 in diameter and 2 ft high total 4.7124 ft³ before allowance.
What to check before using the result
- The form’s outside size can overstate the concrete volume.
- This tool counts concrete for dimensions you supply; it does not size a footing or foundation.
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References & product information
Method prepared 2026-10-21. See our calculation and editorial methods. Spotted a problem? Tell us about it.