How Many Fence Panels for 12 Metres?
12 metres of fence with standard 1.83 m (6 ft) panels needs 7 panels and 8 posts. The run divides to 6.56, so you round up.
Try your own numbers
Last checked 10/11/2026. Sources: LSBUD: Linesearch Before U Dig (UK); Jacksons Fencing: Fence panel heights and widths (6 ft, 1.83 m wide is the standard width).
Rounding up, and gates
12 ÷ 1.83 = 6.56, so seven panels. A straight run has one more post than panels: eight. In practice the last panel may need trimming, or the posts spaced a little wider; check what the panel maker allows.
Add a gate and the count can drop. A 1.1 m gate takes 1.1 m out of the run, leaving 10.9 m, which is 5.96 panels: six panels, and eight posts (six panels, plus one for the gate, plus one). A 1.0 m gate leaves 11 m, which is 6.01 panels, so seven. Small differences matter when a number sits close to a whole one.
Set the gate count and width in the calculator to try it. Corners and slopes are not included: each corner adds a post, and a sloping run needs stepped or racked panels. Check for buried services before you dig, for example with LSBUD, and check boundary and height rules with your council.
Common questions
Are all UK panels 1.83 m wide?
Most standard panels are 6 ft (1.83 m) wide, but widths vary by product. Enter the width of the panel you plan to buy.
Do I need gravel boards?
Some fences use them at the base. They are not counted here; they run the length of the fence, so count them separately.