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Fence Calculator — Posts, Panels & Pickets

Estimate fence posts, bays, panels and pickets from run length, post spacing, panel width and picket coverage.

Result

14 posts

13 bays · 13 panels

Approx. 219 pickets at 5.5 in effective coverage.

Formula and worked example

Bays = ceil(run length ÷ maximum post spacing); posts = bays + 1; panels = ceil(run length ÷ panel width).

A 100 ft straight run with maximum 8 ft spacing needs 13 bays and 14 posts before gates or corners.

Assumptions

  • Base result models one straight run. Add corner/end logic per separate run.
  • Maximum spacing is treated as a limit, so bays are rounded up.

Last updated: 2026-09-16

Frequently asked questions

Do gates change the result?

Yes. Treat gate openings and their structural posts separately for an accurate material list.

Why can actual spacing be less than my maximum?

The run is split into a whole number of bays so no bay exceeds the entered limit.

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