How to calculate a fence
A straight fence run breaks down into sections between posts:
Sections = fence length ÷ post spacing, and posts = sections + 1
The extra post is the end post that closes the final section. Corners and gates need their own posts, so add those separately.
Typical post spacing
| Fence type | Common spacing |
|---|---|
| Pre-made panels | 6 or 8 ft (match the panel) |
| Wood picket / privacy | 6–8 ft |
| Chain link | up to 10 ft |
Don't forget
- Concrete for posts. Each post typically needs 1–2 bags — size it with our concrete calculator.
- Rails. Non-panel fences usually need 2–3 horizontal rails per section.
- Pickets. For a picket fence, divide the length (in inches) by picket width + gap to count pickets.
- Gates. Each gate needs its own pair of sturdy posts and hardware.