Fencing
Fence Picket Calculator
Estimate fence pickets from fence length, picket width, spacing gap, and waste factor.
Calculator inputs
Fence Picket Calculator Results
Results update in your browser as you edit inputs. They are planning estimates, not complete shopping lists.
Enter project dimensions to calculate material quantity.
Assumptions
- The calculator estimates pickets only, not posts, rails, gates, hardware, or concrete.
- It assumes a straight run with consistent picket width and gap.
- Gate openings and corner transitions should be measured separately.
- Picket counts are rounded up to whole pieces.
- Check local building codes, permit requirements, product labels, and qualified professionals for structural or safety-critical work.
- Cost outputs use only the unit prices you enter.
Formula
- Fence length in inches = fence length in feet x 12.
- Picket module = picket width + gap.
- Pickets needed = ceil((fence length in inches + one gap) / picket module).
- Pickets including waste = ceil(pickets needed x (1 + waste factor)).
How to Use the Fence Picket Calculator
- Enter the straight fence run length in feet.
- Enter actual picket width in inches.
- Enter the planned gap between pickets.
- Add waste for cuts, damaged pickets, corners, and field changes.
- Measure gates, corners, slopes, posts, and rails separately.
Fence Picket Calculator Examples
100 ft fence with 5.5 in pickets and 0.25 in gap
A 100 ft straight run is 1,200 inches. With a 5.5 in picket and 0.25 in gap, the estimate is about 209 pickets before waste and 230 with 10% waste.
- Fence length: 100 ft
- Picket module: 5.75 in
- Base count: about 209
- With 10% waste: about 230
50 ft garden fence with 3.5 in pickets and 0.5 in gap
A 50 ft run is 600 inches. With a 3.5 in picket and 0.5 in gap, the estimate is about 151 pickets before waste and 159 with 5% waste.
- Fence length: 50 ft
- Picket module: 4.0 in
- Base count: about 151
- With 5% waste: about 159
Units and Parameters Quick Reference
Fence picket inputs
Small changes in picket gap can noticeably change total count on long fence runs.
| Input | Unit | Planning note |
|---|---|---|
| Fence length | ft | Use straight-run length excluding gates if measured separately. |
| Picket width | in | Use actual picket width. |
| Gap | in | Use planned visible spacing. |
| Waste factor | % | Adds pickets for cuts, damage, and layout changes. |
| Posts and rails | separate | Not included in this picket-only estimate. |
Slopes, gate openings, corners, and code requirements should be measured separately.
Example calculation
Example: 100 ft fence
A 100 ft fence using 5.5 in pickets with a 0.25 in gap needs about 209 pickets before waste and 220 pickets with 5% waste.
Common mistakes
- Forgetting gates and corners change material planning.
- Using nominal board width instead of actual picket width.
- Assuming this includes posts, rails, and fasteners.
FAQ
Does this include fence posts?
No. It estimates pickets only.
Can I use zero gap?
Yes. Enter 0 for the gap, but remember wood can move with moisture.
How many pickets do I need for a 100 foot fence?
With 5.5 in pickets and a 0.25 in gap, a 100 ft straight run needs about 209 pickets before waste.
Does this include fence posts and rails?
No. It estimates pickets only. Posts, rails, gates, hardware, concrete, and bracing are separate.
Should gate openings be included?
Measure gates separately. If the gate will use pickets, estimate that gate section with its own width and layout.
Related Planning Tools
Use these related calculators when the same project needs another material estimate. Each link opens a browser-based tool with its own assumptions and formulas.