Fence Picket Calculator
Estimate picket quantity from fence length, picket width and gaps.
Project details
Enter your measurements below.
Picket count is a repeating width-plus-gap pattern
For a straight fence run, each picket consumes its own face width plus the gap beside it. That repeating pitch is more useful than square footage because pickets are linear pieces, not wall panels. This calculator estimates how many full pickets are needed for a run with consistent spacing. Before ordering, check how the pattern lands at the ends, around gate posts and at corners. A small adjustment to the gap can prevent a visibly narrow final space.
Nominal board size may not match the finished picket face.
Picket width plus clear gap controls the repeating pitch.
Final spacing may be adjusted slightly so both ends look balanced.
How to use the Fence Picket Calculator
- Measure the clear fence run that will be filled with pickets between fixed posts or boundaries.
- Enter the actual picket face width and intended clear gap.
- Divide the run by the repeating picket-plus-gap pitch and round to a practical whole-picket count.
- Check the resulting end gaps on a layout sketch, then adjust the gap slightly if needed while staying within the intended design.
Why the last gap deserves a check
A mathematical repeat rarely lands perfectly on both ends of a real run. A tiny distributed gap adjustment often looks better than one narrow sliver or oversized end space.
Turn count into a visual layout
Mark several pickets at full scale or calculate the actual distributed gap before cutting rails or fixing the first board.
Worked example: 8 ft panel with 3.5 in pickets
- Clear run
- 96 in
- Picket face
- 3.5 in
- Planned gap
- 1.5 in
- Pitch
- 5.0 in
96 ÷ 5 = 19.2 repeating pitches. A real layout needs a whole picket count and balanced end gaps, so the final spacing should be checked rather than blindly using 19.2.
Practical planning tips
Measure the clear run between the surfaces that actually bound the pickets, not the overall fence-line length through posts.
Use the finished face width after milling or product sizing, especially with nominal lumber.
Lay out gates separately because picket spacing on the gate leaf may need to align visually with the fence.
If the design alternates picket widths or uses a decorative pattern, calculate one full pattern module rather than a single picket pitch.
Common mistakes to avoid
Using nominal board width instead of actual face width.
Forgetting that the final gap may need to be balanced at both ends.
Including post widths inside the clear picket run and effectively counting space twice.
Assuming a decorative alternating pattern can be estimated with one uniform picket width.
Fence Picket Calculator FAQs
Do I include the gap when calculating picket count?+
Yes. The repeating layout is the picket face plus its clear gap.
Why doesn't the division usually give a whole number?+
Real fence runs rarely equal an exact number of picket pitches. The layout is balanced by choosing a whole picket count and slightly adjusting gaps.
Should I measure through the posts?+
No. Measure the clear run that the pickets actually occupy, or otherwise model post widths explicitly.
Can I use this for a gate?+
Yes for the picket field on the gate leaf, but calculate the gate's clear picket width separately from the surrounding fence run.