How Many Fence Panels for 18 Metres?
18 metres of fence in 2.4 m bays needs 8 panels, 9 posts and, with three rails to a bay, 24 rails.
Try your own numbers
Last checked 10/11/2026. Sources: Before You Dig Australia.
Panels, posts and rails
18 ÷ 2.4 = 7.5, so eight bays. One more post than bays is nine posts. If you build the fence from rails and palings, three rails to a bay is common, which is 24 rails, each 2.4 m long. For ready-made panels set rails to 0.
A gate changes the arithmetic. A 1 m gate takes 1 m out of the run: 17 ÷ 2.4 = 7.08, so still eight bays, but now ten posts, because the gate adds one. The gate posts usually need to be stronger than the rest.
Dividing fences are shared with your neighbour, and the rules on notice, cost and height differ by state, so check before you build. Request plans of underground services through Before You Dig Australia before digging post holes, and use the concrete calculator for the holes. This is not building advice.
Common questions
How far apart are the posts?
The bay width sets it: 2.4 m here. Use the spacing the fence maker specifies.
Does it include the posts’ concrete?
No. Use the button under the result to carry the post count to the concrete calculator.