Use this free fence calculator to plan a home-improvement or DIY project from the measurements and product information you already have.
HomeCalc shows the formula behind the result and keeps product-dependent assumptions editable where possible, so the calculation can match the material, package or supplier you actually plan to use.
A straight fence run is divided into sections between posts. HomeCalc subtracts gate/opening width from the usable fence length, estimates sections from post spacing and calculates the corresponding post and panel counts.
FREE FENCE ESTIMATOR
Fence Calculator: Posts, Panels & Sections Needed
Estimate posts and panels for a straight fence run using spacing, panel width and gate openings.
Fence posts
Approx. 12 panels over 96 ft of fence
This is a straight-run planning estimate. Corners, end posts, gate posts, terrain and local installation requirements can change post count.
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Count fence sections first, then posts
A straight fence run is divided into sections between posts. HomeCalc subtracts gate/opening width from the usable fence length, estimates sections from post spacing and calculates the corresponding post and panel counts.
usable fence length ÷ spacing = sections; sections + 1 = posts
What to check before using the result
- Measure each straight run separately when the fence turns corners.
- Match post spacing and panel width to the fence system you intend to buy.
- Gates and corners can require dedicated or heavier posts beyond a simple straight-run estimate.
- Check property lines, utilities, setbacks, permits and local footing requirements before digging.
A line divided into sections needs a post at both ends. That is why a straight run with 12 sections needs 13 posts before special gate, corner or terminal requirements are considered.