How to use this picket fence calculator
A picket fence needs an even rhythm across the fence runs. Enter the actual picket width and desired gap to estimate boards, together with common post and rail quantities. A physical layout is essential to balance end gaps and gate details.
Step-by-step instructions
- Enter overall fence length and gate openings.
- Set picket face width and visible gap.
- Choose post spacing, rail count and extra material allowance.
Calculation formula
Important assumptions and limitations
One straight line of fence. Picket distribution may be altered to make bays aesthetically even. Rails are linear footage before stock cutting.
For material orders, confirm package yields, stock sizes and installation instructions with the actual manufacturer or supplier. Your building department determines the applicable local code; a quantity estimator is not a structural design or permit approval.
Frequently asked questions
Should I buy exactly the calculated pickets?
No. Allow for broken, rejected or trimmed boards; the tool offers a user-adjustable extra percentage.
Can I use the same calculation on a curved fence?
Not accurately without subdividing the curve into separately measured straight runs.
We publish formulas and assumptions so you can verify an estimate. Learn about our methodology or report an issue.