Planning a fence installation means figuring out how many panel sections and support posts are needed to cover the total perimeter — a simple division that's still easy to get slightly wrong, especially the post count.
This calculator divides your total fence length by the panel width to find how many panels you need, rounding up since partial panels still require a full section, then calculates posts as one more than the panel count, since each panel needs a post on both ends and adjacent panels share a post.
This gives a solid starting estimate for material planning and cost estimation before ordering, though corner posts, gate posts, and any custom sections would need to be accounted for separately since they often require different hardware.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Because there's no sign-up or installation step, you can jump straight from a search result to a working tool in a couple of seconds.
The interface is intentionally simple, so there's no learning curve — the input goes in, the result comes out, and that's the whole interaction.
Frequently asked questions
Why are there always one more posts than panels?
Each panel is bounded by two posts, and adjacent panels share a post between them, so a straight run of fence always needs exactly one more post than the number of panels.
Does this account for gates or corners?
No, this calculates a straightforward, uninterrupted fence run; gates and corners typically need additional posts and hardware beyond this baseline calculation.