Concrete Pier Calculator
Estimate concrete for cylindrical piers with optional widened bases, including volume, full bags, placed weight and ready-mix cost.
Default project preview
1.37 yd³
Concrete bags
62
Shaft volume
1.24 yd³
Bell-base extra
0 ft³
Total drilled depth
24 ft
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Shaft volume = π × radius² × depth × quantity. Optional bell volume adds only the widened area beyond the shaft. Allowance is applied before bag rounding.
FAQ
Concrete Pier Calculator questions
Is a concrete pier the same as a post hole?+
The geometry can be similar, but structural piers may carry significant loads and require engineered diameter, depth, reinforcement and bearing.
How is an optional bell base counted?+
Only the widened portion beyond the shaft diameter is added, avoiding double-counting the shaft through the bell thickness.
Does this account for soil falling into the hole?+
The allowance can cover modest irregularity, but unstable excavations may need casing, forms or a larger contingency.