How Many Bags Of Concrete For Fence Post
Quick answer: Enter your post-hole or slab dimensions to estimate cubic feet and number of 60lb/80lb concrete bags.
Calculator (Concrete bags estimate)
Steps
- Measure length, width, and depth (inches or feet).
- Convert inches to feet if needed.
- Compute volume (ft³) and add a waste factor (5–15%).
- Convert volume to number of bags (60lb or 80lb).
Reference tables
Concrete bag yield (typical)
| Bag size | Approx yield (ft³) | Notes |
|---|---|---|
| 60 lb | 0.45 | Common for small projects |
| 80 lb | 0.60 | Fewer bags, heavier to handle |
Related pages
Disclaimer: DIY guidance only. Verify dimensions, codes, and safety requirements for your project.
Get more home project checklists and quick calculators at https://risingriverllc.com
Inputs
- Your dimensions (length/width/depth) and units
Outputs
- Estimated quantity
- Waste factor suggestion
- Printable material list
FAQ
Should I add extra for waste?
Yes. Most projects benefit from 5–15% extra depending on cuts, compaction, and mistakes.
Is this estimate exact?
No. It is a quick estimate. Confirm with product specs and local conditions.
What units should I use?
Use feet/inches consistently. The calculator converts common inputs.