Fence Post Calculator
Estimate fence post count from fence length and post spacing, including posts at both ends.
Set your values
Adjust the values, then calculate your result.
How to use Fence Post Calculator
- Enter the measurements or amounts in the fields above.
- Check that dimensions, rates and units match the labels.
- Select “Calculate posts” to see a clear estimate and the formula used.
How the fence post calculator works
Number of spaces = fence length ÷ maximum spacing, rounded up. Add one post for the far end.
Check your measurements and assumptions
Corners, gates, slope changes and local wind or soil requirements can require additional posts and closer spacing. Confirm the layout before purchasing materials.
Review the estimate before you act
Compare this result with an independent measurement, supplier quote or institution guidance when the decision matters. Confirm that the units and assumptions match the labels above, and update the inputs when the conditions change. Keep a note of the values used so you can reproduce the estimate later. This calculator is a planning aid and does not replace professional, product-specific or local guidance.
How many fence posts do I need?
Divide the fence run by your chosen maximum spacing, round up to whole sections and add one post for the final end.
Is input uploaded?
Processing takes place in your browser. This tool does not send your input or selected files to a conversion API.