Skip to content
Builders-Tools
My project listConcrete calculatorConcrete slab calculatorCubic yard calculatorSee all: Concrete and masonryRoofing calculatorRoof pitch calculatorStair calculatorSee all: Framing and roofingGravel calculatorMulch calculatorTopsoil calculatorSee all: Landscape and hardscapeBags of concrete per yardConcrete curing timeLumber size chartSee all: Guides

Fence calculator

Enter the fence length and gates. Leave picket width at 0 for a panel or rail fence.

Enter your numbers to see the result.

A fence is a row of sections between posts. Count the sections and everything else follows.

How it works

  • Sections = fence length without gates / post spacing, rounded up.
  • Posts = sections + 1, plus one per gate for the second gate post.
  • Rails = sections x rails per section.
  • Pickets = fenced length in inches / (picket width + gap).

Before you dig

  • Find your property line. A survey or the plat for your lot shows it.
  • Call 811 a few days before digging so buried utilities get marked.
  • Check height limits and permit rules for your town and any HOA.

Set the posts with the post hole concrete calculator.

Frequently asked questions

How many posts for a 100 ft fence?

At 8 ft spacing, 13 sections and 14 posts, plus gate posts.

How far apart should fence posts be?

6 to 8 ft is common for wood fences. Check your panel or rail lengths.

How many pickets per 8 ft section?

5-1/2 in pickets with 1/2 in gaps: 16 per 8 ft section.