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Fence Material Estimate
15 posts · 12 panels for 100 ft fence
Generated
7/8/2026
Plan view (15 posts)
Materials
Posts
15
Panels / sections
12
Rails
39
Sections
13
Concrete
10.5 ft³
60 lb bags
24
80 lb bags
18
Gates
1
Step-by-step calculation
Formula
# posts = ceil(length / spacing) + 1 + gates. # sections = ceil(length / spacing). # rails = sections × rails-per-section. Concrete per post = π·(4/12)²·depth (8-inch hole).
- 1Length: 100 ft, post spacing: 8 ft.
- 2# sections = ceil(100 / 8) = 13.
- 3# posts = 13 + 1 (end) + 1 (gate posts) = 15.
- 4# rails = 13 × 3 = 39.
- 5Concrete per post (8-inch diameter hole, 2 ft deep) = π × (4/12)² × 2 ≈ 0.70 ft³.
- 6Total concrete: 10.47 ft³ → 24 × 60 lb bags or 18 × 80 lb bags.