Fence Post Calculator – Posts, Spacing & Concrete
Building a fence? Our fence post calculator finds exactly how many posts you need, the correct spacing, and how many bags of concrete to set them securely.
Fence Post Calculator
Standard Fence Post Spacing
| Fence Type | Recommended Spacing |
|---|---|
| Privacy/Wood | 6–8 feet |
| Chain Link | 6–10 feet |
| Split Rail | 8–10 feet |
| Vinyl | 6–8 feet |
Frequently Asked Questions
How many posts for 100 feet of fence?
At 6-foot spacing: 18 posts (100 ÷ 6 = 16.7 sections + 1 end post).
How many bags of concrete per post?
One 50 lb bag for a 4×4 post. One 80 lb bag for a 6×6 post.
How deep should fence posts be?
Bury at least 1/3 of post length underground. For a 6-ft fence, use 8-ft posts buried 2 ft deep.