FREE · CALCULATORS & CONVERTERS
Fence Calculator.
Count fence posts, bays and rails from the run and the post spacing, plus concrete for round post holes.
Posts include both ends. Every bay uses the same rail count. Hole volume is a cylinder and ignores the post itself. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
- Posts
- 7
- Bays
- 6
- Rails
- 12
Posts are floor(run / spacing) + 1, including both ends. Rails are the bays times the rails per bay. Concrete is a round hole for every post and is omitted when the hole size is zero.
How to use Fence Calculator
Enter the run and the centre-to-centre post spacing. Set the hole diameter or depth to zero to skip concrete.
How it works
Count fence posts, bays and rails from the run and the post spacing, plus concrete for round post holes. Posts include both ends. Every bay uses the same rail count. Hole volume is a cylinder and ignores the post itself. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
Example
A 12 m run with posts every 2 m and two rails per bay.
Questions about Fence Calculator
Is Fence Calculator free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Posts include both ends. Every bay uses the same rail count. Hole volume is a cylinder and ignores the post itself. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.