What does this tool do?
Fence quantities depend on the run length and panel width, with a post at each end and between panels. Rounding up matters because a partial panel still needs a full post and a full panel.
The Formula
Panels = ceiling(length ÷ panel width); posts = panels + 1; rails = panels × rails per panelFrequently Asked Questions
Should I add extra panels?
Add one or two for cuts, gate returns and future repairs. Odd runs often need a trimmed end panel, which wastes part of a unit.
Do fence posts need concrete?
Most timber posts last longer set in concrete or compacted gravel. Check local frost depth and the manufacturer guidance for the post type you choose.