Fence Post Spacing Calculator

Even fence post spacing without the guesswork

The most common fence-building mistake is deciding you want posts every eight feet, driving stakes on that spacing, and running out of room at the end with a two foot stub of a panel. Instead, decide the maximum spacing you can accept, then let the total length choose the actual spacing. That is what this calculator does: it takes your maximum and divides the run into the smallest number of equal sections that stay under it.

Sections, panels, and posts

For every section of fence you need one panel and two posts, but the posts are shared between sections. A straight run of N sections needs N + 1 posts. Corners are extra because they carry load in two directions, and gates need a hinge post and a latch post that are usually beefier than line posts.

Choosing a spacing

Six to eight feet is standard for wood privacy fences. Vinyl privacy panels are usually sold pre-built at fixed widths (typically 6 or 8 feet) and the panel spec sets the spacing. Chain link tolerates up to 10 feet between posts. Windy sites, tall fences, and heavy panels all argue for tighter spacing.

What the calculator does not know

It does not know about slope, obstacles, or the property line survey. On a real installation, walk the run first, mark the corners, and confirm the total length before ordering. If you have a mid-run obstacle like a tree or utility, break the run into two runs and calculate each separately.