Fence Posts Calculator
Count the posts for a straight fence run from its length and spacing.
Quick answer: enter your details below and click Count Posts — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Measure the fence run in metres.
- Enter the spacing between posts.
- Click Count Posts.
About this tool
Divide the fence length by the post spacing and add one for the end post, and you have the post count. Corner and gate posts may add extras, so treat the result as the count for one straight run plus any extras you plan separately.
Frequently asked questions
What if the length does not divide evenly?
The tool rounds the bay count down, so the last bay will be slightly shorter; adjust spacing evenly instead if you prefer equal bays.
How deep should posts go?
A common rule is about a third of the post underground, but local frost and soil conditions matter.