Fence Post Concrete Calculator
Estimate concrete volume, bags and material cost for multiple round fence post holes.
Fence Post Concrete Calculator
Calculate concrete for cylindrical post holes. The post displaces some concrete inside each hole.
Post hole dimensions
Your estimate
Calculation details
Planning estimate only. Post size, soil, frost depth and local requirements require separate checks.
For each hole: concrete volume = π × (hole radius)² × depth − post cross-sectional area × embedded depth. This calculator assumes a square post extending the full hole depth. Use an allowance for uneven holes and spillage.
Fence post concrete FAQs
Why subtract the post volume?
The part of the post inside the hole takes up space that concrete cannot occupy.
Can I use this to determine hole depth?
No. Appropriate depth depends on soil, frost conditions, loads and local requirements.
How MaterialMetrik works
Enter project dimensions in your preferred unit system.
Choose realistic allowances, yields, densities and supplier prices.
See transparent quantities, whole packaging units and costs.
Frequently asked questions
Are prices live supplier prices?
No. All prices are entered by you; the tool does not fetch local prices or currency exchange rates.
Does changing units change the project size?
No. Existing dimensions are converted to equivalent values when switching between imperial and metric.
Are these engineering calculations?
No. These are preliminary material quantity estimates. Structural design, foundations and local code compliance require appropriate professional review.
Can I share an estimate?
Yes. The share button creates a URL containing the calculator's input values. It does not upload your project data.