Fence Calculator

Estimate posts, rails and pickets for a wood fence.

Fence length

Post spacing

Rails per section

Picket width

Gap between pickets

Posts (posts) 14

Pickets (pickets) 219

Total rail length 300

Formula: posts = length ÷ spacing + 1

Step-by-step with your numbers:

1. Values used:

2. Fence length = 100

3. Post spacing = 8

4. Rails per section = 3

5. Picket width = 5.5

6. Gap between pickets = 0

8. Posts = 14posts

9. Pickets = 219pickets

10. Total rail length = 300

Did we solve your problem today?

Plan a wood privacy or picket fence: how many posts, rails and pickets you'll need for a given run.

The math behind it

Posts = fence length ÷ post spacing, rounded up, plus one for the end.

Pickets = fence length (in inches) ÷ (picket width + gap).

Rail length = rails per section × fence length.

100 ft fence, 8 ft spacing, 3 rails, 5.5 in pickets touching → 14 posts, ~219 pickets, 300 ft of rail.

How far apart should fence posts be?

Commonly 6–8 ft on center for wood fences.