Fence Picket Count Calculator
Estimate the number of vertical pickets needed for a straight fence run. The tool shows the method and key assumptions so you can inspect how the input values lead to the estimate.
How to use this calculator
- Enter fence length (m) using the unit and definition shown beside the input.
- Enter picket face width (mm) using the unit and definition shown beside the input.
- Enter clear gap between pickets (mm) using the unit and definition shown beside the input.
- Check that all values refer to the same time period and scenario.
- Review the outputs alongside the assumptions before using them in a decision.
Formula and assumptions
Base count=ceil(fence length in mm/(picket width+gap)); purchase estimate adds the entered waste percentage and rounds up.
- The estimate assumes an evenly repeated picket width and gap along a straight run. Gates, corner posts, end spacing, board overlap and local fence requirements can change the actual count.
- The estimate is calculated from values you enter. It does not connect to external accounts, obtain live prices, or validate local regulations or engineering specifications.
Worked examples
Worked example
An 18 m run with 90 mm pickets and 20 mm gaps needs about 164 pickets before waste.
Enter length, board face width, gap and waste allowance.
Check layout and end-spacing details before purchasing materials.
Understanding the result
The estimate assumes an evenly repeated picket width and gap along a straight run. Gates, corner posts, end spacing, board overlap and local fence requirements can change the actual count.
Change one input at a time to see how sensitive the output is to that assumption.
Important notes
The estimate assumes an evenly repeated picket width and gap along a straight run. Gates, corner posts, end spacing, board overlap and local fence requirements can change the actual count.
Frequently asked questions
What formula does the Fence Picket Count Calculator use?
Base count=ceil(fence length in mm/(picket width+gap)); purchase estimate adds the entered waste percentage and rounds up.
What should I verify before relying on the result?
The estimate assumes an evenly repeated picket width and gap along a straight run. Gates, corner posts, end spacing, board overlap and local fence requirements can change the actual count.
Can I compare different scenarios?
Yes. Change one assumption at a time, keep units and definitions consistent, and save the inputs used for each comparison.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.