Post Hole Calculator
Calculate concrete, gravel, and materials needed for post holes. Estimate costs for fence, deck, or structure posts with accurate volume calculations.
Step 1: Post Hole Dimensions
Post Hole Guidelines
Standard fence post holes are typically 6-12 inches in diameter and 24-36 inches deep. For deck posts, holes are often 12 inches in diameter and 36+ inches deep.
Step 2: Materials & Cost
Material Estimates
One 40lb bag of concrete typically fills about 0.3 cubic feet. Gravel improves drainage and stability. Add 4-6 inches of gravel at the bottom of each hole.
Post Hole Materials Estimate
Total Estimated Cost
Complete Materials List
| Material | Quantity | Unit Price | Total Cost | Notes |
|---|
Volume Breakdown by Component
Post Hole Calculation Formula
Volume = π × (Diameter/2)² × Depth × Number of Holes
Calculate volume of a cylinder for each hole, then convert to cubic feet. Concrete bags needed = Total Volume ÷ Coverage per bag.
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