Concrete Post Hole Calculator
Setting posts? Calculate exactly how much concrete you need for post holes with our free tool.
Feet, inches, yards
Dimensions
ft
ft
Add 10% extra for waste, spills, and uneven surfaces
Pro Tips
- →Post holes should be 3 times the post width
- →Depth should be 1/3 to 1/2 the above-ground height
- →Extend below frost line in cold climates
- →Use fast-setting concrete mix for posts
- →Add gravel at bottom for drainage
Technical ResultDone
0.77YD³
Includes 10% waste factor
Bags (80lb)35
Total Volume20.7FT³
Estimated Weight3,110LBS
Cubic Meters0.59M³
Cost Estimate
Estimated material costs for your project
Recommendation: Bagged Concrete
For smaller projects, bagged concrete gives you more control and less waste.
Bagged Concrete (80lb)$193 - $280
35 bags × 80lb
Ready-Mix Concrete$100 - $254
0.77 cubic yards + delivery
Prices vary by location and time. Contact local suppliers for accurate quotes.
For general step-by-step instructions, read our complete How Many Bags and How To Mix Concrete.