Post-hole concrete
Post-hole concrete: use hole diameter, hole depth, number of holes. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
V = π(D_hole²−D_post²)/4 × depth × count
Variables & units
- Hole diameter
- m · minimum 0, maximum 1000000000000
- Hole depth
- m · minimum 0, maximum 1000000000000
- Number of holes
- Numeric value · minimum 0, maximum 1000000
- Round post diameter
- m · minimum 0, maximum 1000000000000
Worked example
Use the example inputs to explore this model; the solution shows each supplied quantity.
Assumptions
Ideal cylindrical holes and round posts; excludes waste and irregular excavation.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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