Post-Hole Concrete Calculator
Estimate concrete volume, bag quantity, excavation volume and material cost for round fence, deck or sign-post holes.
Default project preview
47 bags
Concrete volume
1.02 yd³
Concrete per hole
2.3 ft³
Excavated volume
1.05 yd³
Total drilled depth
36 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.
Concrete per hole = cylindrical hole volume − post displacement. Total order = concrete per hole × hole count × allowance.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Post-Hole Concrete Calculator questions
Should the post volume be subtracted?+
Yes for a closer estimate. The calculator subtracts a circular displacement based on the entered post width.
How deep should a post hole be?+
Depth depends on post height, wind, soil, frost line and local requirements.
Can dry concrete be poured directly into the hole?+
Follow the exact product instructions and project requirements; installation methods vary.