Fence Calculator
Estimate the posts, rails, pickets and concrete for a straight run of picket or privacy fence.
Fence posts
14
- Sections
- 13
- Rails
- 26
- Pickets
- 209
- 80 lb concrete bags (≈0.60 ft³ each)
- 22
Add a post and hardware for each gate. Material counts are estimates — check with your supplier and local code before you buy.
Show the work
Sections: fence length ÷ post spacing, rounded up
sections = ⌈length ÷ spacing⌉
⌈100 ÷ 8⌉ = 13
Posts: one more than the sections
posts = sections + 1
13 + 1 = 14
How it works
Sections = ⌈length ÷ post spacing⌉; posts = sections + 1; rails = sections × rails per section; pickets = ⌈length ÷ (picket width + gap)⌉
Questions
- How does the fence calculator work?
- Sections = ⌈length ÷ post spacing⌉; posts = sections + 1; rails = sections × rails per section; pickets = ⌈length ÷ (picket width + gap)⌉.
- What do I need to enter?
- Fence length, Post spacing, Rails per section, Picket width, Gap between pickets, Post size, Post hole diameter, Post hole depth. Optional fields can be left blank.
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Want this on your site? Embed the fence calculator.