CONCRETE ESTIMATOR
Post Hole Concrete Calculator
Estimate concrete for fence posts, deck posts and other round post holes.
Use the calculator →Quick answer
Measure the actual hole diameter and depth rather than relying only on nominal auger size.
Your final order should reflect the actual dimensions, conditions, product yield and any buffer you choose.
How the calculation works
The post-hole mode calculates the volume of the cylindrical hole and subtracts the volume displaced by a square post. Multiply the remaining concrete volume by the number of holes.
Calculate your actual project
Enter your measurements and see yards plus five bag sizes.
Before you buy
- Measure the actual area and depth.
- Confirm the yield printed on the bag or supplier specification.
- Plan for site variation and spillage.
- For larger pours, compare ready-mix delivery with bagged material and labor.