Toolnoza

CONSTRUCTION TOOL

Fence Post Spacing Calculator

Find evenly spaced fence bays and post counts for one straight open fence run.

Fence Post Spacing Calculator

FREE ONLINE TOOL
Calculation preview
Posts / bays: 9 / 8; Actual spacing: 2.5 m20 m
Posts / bays
9 / 8
Actual spacing
2.5 m

Schematic · not to scale

Formula and assumptions

N = ceil(L/Smax); Nposts = N + 1; S = L/N

Length and spacing are center-to-center. Includes both end posts. Gates, corners, closed loops and structural design need separate calculations.

STEP BY STEP

How to use fence post spacing calculator

  1. Check the input units and assumptions.
  2. Review the result and example.

IN PRACTICE

Example

20 m; Smax = 2.5 m → N = 8; Nposts = 9; S = 2.5 m.

GOOD TO KNOW

How is this result calculated?

Bays = ceil(length / maximum spacing); posts = bays + 1; actual spacing = length / bays. Length and spacing are center-to-center. Includes both end posts. Gates, corners, closed loops and structural design need separate calculations.

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