Home Improvement

Fence Post Calculator

Estimate line posts from fence length and maximum post spacing, plus corners and gate posts.

FreeResult emailed + shownReviewed September 9, 2026
Home Improvement
Step 1

Enter your numbers

Method

How this fence post calculator works

The run is divided into spans no longer than your spacing limit. One post is added to close the run, then any additional corner, gate or special posts are included.

How to use it

  1. Fence run length. Enter the value in ft.
  2. Maximum post spacing. Enter the value in ft.
  3. Extra corner/gate/end posts. Enter the value that applies to your situation.
  4. Request the result. Add your email, then select “Email & show my result.”

What to do with the number

Real layouts should be broken into separate straight runs; a single total can undercount corners. Calculate each fence side separately when the layout turns corners, then combine the results and remove duplicated corner posts.

Planning estimate

Use this result as a starting point, not a guarantee. Product specifications, site conditions, manufacturer guidance, local codes, taxes, labor, tolerances, and rounding can change the real requirement or cost.

FAQ

Questions about this calculator

What does the Fence Post Calculator calculate?

Estimate line posts from fence length and maximum post spacing, plus corners and gate posts.

What inputs does this fence post calculator use?

The calculator uses fence run length, maximum post spacing, extra corner/gate/end posts. You can replace every default with the numbers that match your situation.

How should I use the Fence Post Calculator result?

Real layouts should be broken into separate straight runs; a single total can undercount corners.

What can make the real-world result different?

Calculate each fence side separately when the layout turns corners, then combine the results and remove duplicated corner posts.

Can I change the calculator assumptions?

Yes. The editable inputs are the assumptions. Replace the default values with your own measurements, prices, rates, quantities, or specifications before requesting the result.