Post Hole Digger Calculator
Calculate post hole dimensions, concrete requirements, and materials needed for fence installation. Perfect for planning fence posts, deck posts, and sign posts.
Step 1: Post Hole Dimensions
Standard Post Hole Guidelines
For most fence posts: Dig holes 1/3 the post length + 6 inches for gravel. A 6-foot post requires a 2.5-foot hole. Diameter should be 3x the post width.
Step 2: Material & Cost
Concrete Coverage
One 50-pound bag of concrete mix yields approximately 0.375 cubic feet. For a 6-inch diameter hole, one bag fills about 1.5 feet of depth.
Post Hole Calculation Results
Total Materials Required
Material Requirements Comparison
| Post Type | Hole Volume | Concrete Bags | Total Cost | Cost per Post |
|---|
Hole Dimension Details
Post Hole Volume Formula
Volume = π × (radius)² × depth × number of posts
The total volume is calculated using the cylinder volume formula. Convert all measurements to consistent units before calculating. Remember: 1 cubic foot = 0.037 cubic yards.
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