Post Hole Concrete
Cylindrical volume; ~0.6 ft³ per 80 lb bag rule-of-thumb.
Inputs
Results
Volume
16.49 ft³
80 lb bags28
How to Use This Calculator
- Enter the hole diameter in inches — a common post hole is 10–12 inches wide.
- Enter the hole depth in inches — fence posts typically go 1/3 of their above-ground length into the ground.
- Enter the number of post holes.
- Read the total concrete volume in cubic feet and the number of 80 lb bags needed.
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