Construction & Materials
Fence Calculator
Fence — it divides fence length by post spacing for the number of sections (rounded up), then posts = sections + 1; it does not count rails or panels. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Fence Calculator helps you plan a fence line. Enter your fence length and post spacing and it returns the number of posts and sections instantly, right in your browser with nothing uploaded.
Estimate only — not engineering or contractor advice. Posts and sections depend on the fence length and post spacing you enter; gates, end posts and any rails or panels are not counted, so confirm your layout.
About this calculator
It divides fence length by post spacing for the number of sections (rounded up), then posts = sections + 1; it does not count rails or panels. That is the whole of the calculation — the mistakes happen in the inputs. It matters before you buy: a clean volume estimate plus a waste allowance beats a guess every time. Worked example: A 30 m fence with posts every 2.5 m needs 30 ÷ 2.5 + 1 = 13 posts and 12 panels. Use the calculator with your own figures; it runs entirely on your device.
How to use
- Enter the fence line length in feet.
- Enter the spacing between posts in feet.
- Read the sections the run divides into.
- Tap Calculate to see the post and section counts.
Why use the Fence Calculator
Instant
Every quantity is worked out on your device the moment you tap Calculate.
Private
The numbers you enter stay in your browser and are never uploaded or saved.
Free
No signup, no paywall, and no ads placed inside your results.
Works offline
Once the page has loaded it keeps working on a weak or dropped connection.
Mobile-first
Laid out for phones and tablets on site just as much as for desktops.
Planning estimates
Results are simplified planning estimates; real material needs vary by product size, waste, layout, local codes, and site conditions, so confirm before you buy or build.
Common uses
Use it for a garden or boundary fence
Use it when checking spacing before buying posts
Use it for the number of posts and sections
Use it when budgeting a fencing job
Use it when laying out runs between corners
Use it for a quick post-count estimate
Technical notes
Fence Calculator divides fence length by post spacing for the number of sections (rounded up), then posts = sections + 1; it does not count rails or panels.
Estimates posts and sections from the fence length and post spacing you enter; gates, rails or panels are not counted.
Nothing you type is uploaded — the calculation happens entirely on your device.
Worked example
A 30 m fence with posts every 2.5 m needs 30 ÷ 2.5 + 1 = 13 posts and 12 panels.
FAQ
How are posts and sections related?
Sections come from the length divided by the spacing, and posts are sections plus one for the end.
Does the Fence Calculator keep my entries private?
Yes. The Fence Calculator runs in your browser, so nothing you enter is uploaded or saved.
What spacing should I use?
Common post spacing is 6 to 8 feet; closer spacing adds posts but stiffens the fence.
Does it count rails or panels?
It counts posts and sections; multiply sections by your rails-per-section to get rail quantities.