How Many Fence Posts Do I Need?
Quick answer: divide the fence run by 8-foot spacing, then add one post for every corner, gate, and end. A straight 100-ft run at 8-ft spacing needs about 13–14 posts total.
- Standard spacing
- Corner & gate posts
- Post count chart
- Worked example
- Common mistakes
Standard spacing
The industry standard is 8 feet between fence posts for wood and vinyl. Taller or wind-exposed fences often tighten to 6 feet for strength. Start with 8 ft, then use tighter spacing only where the design calls for it — every extra post adds concrete, digging, and cost.
Corner & gate posts
Spacing only covers the line posts. You need an extra post at every corner, at every gate, and at both ends of the run. A 4-ft gate takes 2 posts, a 90-degree corner takes 1, and an open end takes 1. These are added on top of the spacing math — forgetting them is the most common under-count.
Post count chart
| Run length | Line posts @8ft | +corners/ends | ~Total |
|---|---|---|---|
| 50 ft | 7 | +2 | 9 |
| 100 ft | 13 | +2 | 15 |
| 150 ft | 19 | +2 | 21 |
| 200 ft | 25 | +2 | 27 |
Add extra posts for each gate beyond the simple straight-run example.
Worked example
A rectangular lot fence, 150 ft per side × 2 = 300 ft, with one 4-ft gate and 4 corners:
- Line posts at 8 ft: 300 ÷ 8 ≈ 38
- Corners: 4 · Gate: 2
- Total posts ≈ 44
The fence calculator handles the full perimeter and gate math for you.
Common mistakes
- Forgetting corner, gate, and end posts. The biggest under-count.
- Spacing wider than 8 ft. Sagging rails and weak panels.
- Not accounting for a second gate. Each gate doubles its posts.
- Ignoring slope. Steep ground may need closer spacing.
FAQ
Standard fence posts are spaced 8 feet apart for wood and vinyl fences. Some heavier or taller designs drop to 6 feet for extra strength. Corner, gate, and end posts are added in addition to the line posts.
For 100 linear feet at 8-foot spacing you need about 12 line posts, plus corner and gate posts. A simple straight 100-foot run is roughly 13-14 posts total.
Yes — every corner, gate, and end of the fence needs a post regardless of spacing. A 4-foot gate usually needs 2 posts, and each 90-degree corner needs 1 corner post.
Yes. Tighter spacing (6 feet) makes a sturdier fence and is common for tall or vinyl fences. It uses more posts, so factor that into the material cost.