Fence Panel Calculator — How Many Fence Panels
Calculate how many fence panels you need for your boundary.
Adds one extra panel as an allowance for breakages or cuts (optional)
How We Calculate This
Panels = Fence Length ÷ Panel Width, rounded up to the next whole panel (you cannot buy part of a rigid panel). The base post count is Panels + 1 — one post at each end plus one between every panel.
The result then adjusts for your layout: each gate opening shortens the run by about 1 m and adds 2 gate posts, and each corner you specify adds 1 corner post. Ticking the spare-panel option adds a single panel for breakages or cuts. So the posts figure can legitimately exceed the simple Panels + 1.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.