Fence Calculator

Estimate the posts and panels needed for a fence.

Inputs

Fence Length (m)

Post Spacing (m)

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Posts Needed

Panels Needed

Spark says

How it's calculated

Formula

Panels = \left\lceil \dfrac{Length}{Post\ Spacing} \right\rceil \quad\quad Posts = Panels + 1

Post\ Spacing: — Distance between adjacent posts

What is the Fence Calculator?

For a straight fence run, the number of posts is always one more than the number of panels — this calculator applies that rule from your total length and post spacing.

How to use it

1 Enter the total fence length.
2 Enter your chosen post spacing.

Worked examples

30m fence, 2.4m spacing

Needs 13 panels and 14 posts.

Try it

Limitations

•Assumes a straight run — corners and gates need extra posts this simple calculation doesn't account for.

Frequently asked questions

Why is posts always panels + 1?

Each panel needs a post on both ends, but adjacent panels share a post — so a straight run of N panels needs N+1 posts total.