Fence panel calculator: how many panels for your run?

Enter the run length, gates and panel width. Each span rounds up to whole panels, and the calculator shows every span so you can check the count.

How many fence panels do you need?

Divide each span by the panel width and round up. That is the whole method, and the rounding is where jobs go wrong. A 64 ft span is 10.67 six-foot panels, so you need 11, not 10. The same span with 8-foot panels is exactly 8.

This fence panel calculator does that for every span in your run. A gate splits a run into separate spans and each one rounds on its own, so a run with gates can need more panels than its total footage suggests.

One 64 ft run, no gates, three panel widths (fictional example)
4 ft panels	64 ft → 16 panels, no remainder
6 ft panels	64 ft → 11 panels, 2 ft over
8 ft panels	64 ft → 8 panels, no remainder

The right width is whichever one your product comes in. The comparison shows the cost of a poor fit: with 6-foot panels this run needs 11 panels and ends 2 ft over, while 8-foot panels fit it exactly.

Rounding, spans and the “over” figure

When a span is not a whole number of panels, the calculator places the posts evenly across the span, so every panel is a little narrower than its nominal width. The “over” figure is the extra panel length that this evenly spaced layout absorbs. Check that your product and installer allow panels set slightly narrower than nominal, or plan to trim.

Gates change the count

Take a 120 ft run with two 4-foot gates and 8-foot panels. The fence footage is 112 ft, which divides into 14 panels. But the gates leave three spans, 28 ft (4 panels) + 56 ft (7 panels) + 28 ft (4 panels), and rounding each one gives 15 panels in total. Counting from footage alone would have understated the order.

What the panel count does not cover

Posts, rails, pickets, caps and hardware. The count is panels only. The fence post calculator handles posts.
Slopes, steps and corners. Each straight, level run is calculated separately.
Waste, damaged stock and manufacturer-specific sizes.

Questions about fence panels

Should I add extra panels for waste? That is a purchasing decision. The calculator shows the planning count with the span rounding already included.

Can I price the job from the panel count? Pricing here is per foot of fence and per gate. The fence calculator turns your own rates into a price.

Fence calculatorFootage, panels, posts and a price from your own rates.Fence post calculatorHow many posts a run needs, span by span.Fence gate calculatorHow gate openings change footage and price.Chain link post calculatorTerminal and line posts from a maximum spacing.

Want the method behind the numbers? Read how many fence panels do you need, or browse all fence guides.

Measuring a whole job with corners and several materials? The fence estimating software page shows how Fencekind turns a measured layout into an estimate, and the field guides cover the studio steps. This calculator is planning arithmetic, not a quote or a survey.