Post Hole Concrete Calculator

Calculate concrete needed to set fence or deck posts in holes. Use this free browser-based post hole concrete calculator from XTRAW Tools.

Post Hole Concrete Calculator helps you calculate concrete needed to set fence or deck posts in holes. Use this free browser-based calculator from XTRAW Tools to compare inputs, estimate results, and plan your next step.

How to Use the Post Hole Concrete Calculator

Enter the required calculator inputs shown in the form.
Review the area, coverage, spacing, pitch, slope, thickness, roll, panel, lumber, joist, post, concrete, or waste assumptions.
Run the calculator, then adjust one input at a time to compare scenarios or check your estimate.

What This Calculator Helps With

Calculate concrete needed to set fence or deck posts in holes. It is designed for contractors, homeowners, builders, remodelers, roofers, framers, deck builders, fence installers, DIY users, and construction planners who want a fast browser-based estimate before relying on supplier charts, contractor estimates, engineering plans, or professional sources.

Hole Diameter: 10 in
Hole Depth: 36 in
Post Diameter / Side: 4 in
Number of Posts: 10

Common Uses

People use this calculator when they need a quick way to estimate fence posts, post spacing, corners, gates, post-hole concrete, and concrete bags.

Material Estimating: Estimate material quantities, waste factors, rolls, panels, bags, board-feet, sheets, posts, concrete, rafters, or linear feet before ordering supplies.
Measurement: Use dimensions, surface area, spacing, thickness, slope, pitch, coverage, openings, and project measurements to calculate a practical result.
Budgeting: Support rough cost planning by estimating quantities before comparing supplier prices or contractor quotes.
Project Planning: Plan job scope, materials, order quantities, construction assumptions, and home-improvement work before starting a project.

Formula or Method

Vol = π × (hole r² − post r²) × depth; per post

Example

Example inputs: Hole Diameter: 10 in; Hole Depth: 36 in; Post Diameter / Side: 4 in; Number of Posts: 10

Example result: Using the default inputs, concrete per hole is 1.37 ft³, total concrete is 13.74 ft³, or about 23 80-lb bags.

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Post Hole Concrete Calculator FAQ

Is the Post Hole Concrete Calculator free?

Yes. This calculator is free to use on XTRAW Tools.

Do I need to create an account?

No. XTRAW tools are designed for browser-based use without requiring an account.

Are the results exact?

Results may be estimates depending on the inputs, formula, rounding, project assumptions, waste factor, coverage rate, material density, supplier specifications, and purpose of the calculator. Always verify important results before relying on them.

Disclaimer: This calculator is provided for general informational, educational, and convenience purposes only. It is not construction, engineering, safety, building-code, structural, roofing, framing, contractor, supplier, legal, financial, or professional advice. Always verify important results with a qualified professional, contractor, engineer, supplier, manufacturer documentation, local code authority, or authoritative source before making decisions.