120 ft perimeter, 1 gate(s)
- Fence run after gates
- 116 ft
- Total posts
- 18
- Gate posts included
- 2
Corners, ends, slope, terrain, bracing, custom panels, and local code can change post and panel needs.
Fence Calculator
Use this free fence calculator to estimate panels, line posts, gate posts, and fence run from a simple perimeter layout.
Research-backed assumptions Formula steps Examples included Private in-browser use
Formula steps
- Subtract gate width from the total perimeter.
- Divide the remaining run by panel width and round up.
- Estimate line posts from spacing, then add two posts per gate.
How to use the fence calculator
- Enter fence perimeter, panel width, post spacing, gate count, and gate width.
- Press Estimate fence to see panel count, fence run after gates, and estimated posts.
- Use it to compare 6-foot and 8-foot panel layouts quickly.
- Corners, ends, braces, slope, utilities, permits, and local rules need separate review.
Common uses
Estimate panels for a backyard fence.
Plan post counts from a chosen spacing.
Account for one or more gates.
Compare 6-foot and 8-foot panel layouts.
Examples
Panels and posts
Gate-adjusted estimate
Simple run count
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Fence Calculator?
Use it when your task matches one of these common needs: Estimate panels for a backyard fence. Plan post counts from a chosen spacing. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Fence Calculator doing with my inputs?
In plain language: The calculator subtracts gate width from total perimeter, divides the remaining run by panel width, estimates line posts from spacing, and adds two gate posts per gate. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
Real fences need corner posts, end posts, bracing, slope handling, permits, setbacks, gate hardware, terrain checks, and local code review. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.
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