Run length divided by the picket pitch
Each picket takes up its own width plus one gap. That sum is the pitch. Divide the fence run by the pitch and round up, and you have the picket count. Work in inches so the gap and board width line up.
A 100 ft run is 1200 inches. With 5.5-inch pickets and a 0.5-inch gap the pitch is 6 inches, so 1200 ÷ 6 = 200 pickets. Subtract the boards that fall inside any gate opening, then add about 10% for waste.
Pickets per 100 feet by style
| Style | Picket width | Gap | Per 100 ft |
|---|---|---|---|
| Private (tight) | 5″ | 0.5″ | ~218 |
| Standard | 5.5″ | 1″ | ~185 |
| Decorative | 6″ | 1.5″ | ~160 |
| Rustic (open) | 4″ | 3″ | ~172 |
Figures are boards only, before waste and gate deductions. Posts are separate: one every 6 to 8 ft, plus one to close the run.
Where counts go wrong
- Forgetting the gap. Dividing by picket width alone overcounts. The gap is part of every picket's footprint, so it belongs in the pitch.
- Ignoring gates. A gate opening holds its own pickets on the leaf, but the boards it removes from the run should come off the fence total, usually 10 to 15 percent on a short run.
- No waste margin. Order about 10% extra for miscuts and warped boards, more on uneven ground.
Common questions
How do I calculate how many fence pickets I need?
Take the total run in inches and divide by the picket width plus the gap between pickets. For a 100 ft run with 5.5-inch pickets and a 0.5-inch gap, that is 1200 divided by 6, which is 200 pickets. Round up, then subtract any gate openings.
What is a normal gap between fence pickets?
Between about half an inch and two inches. A small gap looks like a private fence and lets the wood expand in damp weather; wider gaps use fewer boards and give an open, rustic look.
Do I need to order extra pickets?
Yes. Add roughly 10 percent for saw cuts, warped boards and uneven ground. On sloped or irregular ground add 10 to 15 percent.
