Fence Calculator
Estimate number of posts and fence sections from total fence length.
Estimated Posts: —
Fence FAQ
What is typical post spacing?
6–8 feet on center for wood privacy fences; 8–12 feet for rail fences.
Is the corner post included?
The calculator includes end posts. Add extra for corners and gates.
Results are estimates for planning purposes. Verify with product labels and local requirements before purchasing materials.
How to calculate fence posts and sections
Divide your total fence length by the post spacing to get the number of sections. Add one post for the final end post. Gates require additional posts on either side.
| Fence length | 6 ft spacing | 8 ft spacing | 10 ft spacing |
|---|---|---|---|
| 50 ft | 10 posts | 8 posts | 7 posts |
| 100 ft | 18 posts | 14 posts | 12 posts |
| 150 ft | 26 posts | 20 posts | 16 posts |
| 200 ft | 35 posts | 26 posts | 21 posts |
Fence planning tips
- Call 811 before digging — US law requires locating underground utilities before any excavation.
- Add 2 extra posts for every gate opening — one on each side.
- Corner posts need to be stronger — use a larger post size or set them deeper.
- Check local codes for maximum fence height and setback requirements before purchasing materials.
Frequently asked questions
How many fence posts do I need for 100 feet?
At 8-foot spacing: 100 ÷ 8 = 12.5 sections, round up to 13 sections, plus 1 end post = 14 posts. At 6-foot spacing: 17 sections + 1 = 18 posts.
What is standard fence post spacing?
6–8 feet on center for wood privacy fences. 8–12 feet for rail fences. 10 feet for most chain-link fences.
How deep should fence posts be set?
One-third to one-half of the post length should be buried. For a 6 ft privacy fence, use 8 ft posts set 2–2.5 ft deep.
Do I need concrete for fence posts?
For most privacy and structural fences, yes. Use 1–2 bags of quick-set concrete per post. Light decorative fences may not require concrete.
How far apart should fence posts be for a 6-foot privacy fence?
6–8 feet on center. Closer spacing increases strength. Wider spacing reduces material cost but may make panels look saggy.
Related tools
- Concrete Bag Calculator — estimate concrete for post holes
- Square Footage Calculator — calculate your yard area
- Gravel Calculator — estimate gravel for paths and driveways
QuickJobTools is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.