Fence Post Calculator
Updated Formulas shown
Posts = sections + 1, plus one per gate. A 100 ft run at 8 ft spacing needs 14 posts.
Posts
14
13 sections
- Posts
- 14
- Pickets
- 209
- Rails
- 39
- Post hole depth
- 2.5 ft
- Concrete (50 lb bags)
- 43
- Concrete (80 lb bags)
- 27
Assumes 10 in holes around 4×4 posts. Corner and end posts are often set deeper or larger.
Quick reference
| Length | 6 ft spacing | 8 ft spacing | 10 ft spacing |
|---|---|---|---|
| 25 ft | 6 | 5 | 4 |
| 50 ft | 10 | 8 | 6 |
| 75 ft | 14 | 11 | 9 |
| 100 ft | 18 | 14 | 11 |
| 150 ft | 26 | 20 | 16 |
| 200 ft | 35 | 26 | 21 |
| 300 ft | 51 | 39 | 31 |
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Frequently asked questions
How far apart should fence posts be?
6–8 ft for wood fences, 8–10 ft for chain link, and as specified by the panel size for vinyl.
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Estimates only. Check quantities with your supplier or contractor before ordering.