Post Hole Concrete Calculator
Calculate concrete needed for fence posts and deck footings
How to Use This Calculator
Recommended Hole Size
For optimal stability, dig your post hole with a diameter 3 times the width of your post. The depth should be at least â…“ of the above-ground post height, plus extra for gravel base.
Concrete Tips
Add 10-15% extra concrete to account for soil variations and spillage. For small projects, pre-mixed bags are convenient. For larger projects, ready-mix concrete delivery may be more cost-effective.