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Calculation Machine

Fence Calculator

Posts, rails and pickets needed.

Reviewed by the Calculation Machine team · How we check our maths

Your values

ⓘ Live results

Results
Posts needed
16
Sections
15
Rails
45
Pickets
275
Concrete bags (1 per post)
32
Estimated cost
$2,640.00

Quick answer

Fence posts sit at 6–8 ft centres; picket count is fence length divided by picket width plus spacing.

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Fence length120 ft
  • Post spacing8 ft
  • Picket width5.5 inches
  • Rails per section3
  • Cost per foot22 $

Result

  • Posts needed16
  • Sections15
  • Rails45
  • Pickets275
  • Concrete bags (1 per post)32
  • Estimated cost$2,640.00

How to use the Fence Calculator

  1. 1Measure the total fence run in feet.
  2. 2Choose your post spacing (6 or 8 ft).
  3. 3Enter picket width and rails per section.

Frequently asked questions

How deep should posts go?

One third of post height, minimum 24 inches, below the frost line.

Do gates need extra posts?

Yes, use heavier posts either side of each gate.

About this calculator