Construction Calculators

Fence Calculator

Use this free fence calculator to calculate accurate results instantly with clear inputs, formulas, and rounded answers.

Last updated July 23, 2026
Fence

Fence Calculator

Posts needed
Rails needed
Pickets needed
Results are estimates for informational purposes. Verify critical calculations and project requirements independently.

How to Use the Fence Calculator

Enter the requested values, review the units, and select Calculate Fence. The result updates immediately using the formula below.

Formula

Posts are placed at each section boundary. Pickets are based on fence length divided by picket width plus gap.

Example and Accuracy

The default values provide a working example. Change any input to calculate your own result. The calculator keeps full internal precision and rounds displayed values for readability.

Important Note

This calculator provides an informational estimate. Verify critical financial, medical, construction, scientific, or legal decisions with an appropriate qualified professional.

Calculation Standards

This tool uses documented formulas and high-precision internal values. Displayed results may be rounded for readability. Review the assumptions and verify important decisions with a qualified professional.

Read our calculation methodology