Fence Panel & Post Calculator
Calculate the exact number of fence panels, posts, post-mix concrete bags, and total cost for any fencing project.
Fencing Installation Guide
Panel and Post Quantities
For standard 6ft (1.83m) panels: number of panels = fence length ÷ 1.83 (round up). Number of posts = number of panels + 1 (one post at each end, plus one between each panel). Example: 25m fence ÷ 1.83m = 13.66 → 14 panels, 15 posts. Allow for any corners — each corner requires an extra post. Intermediate posts are typically spaced between panels at exactly the panel width — never wider as this causes the panel to flex and fail under wind loading. Gravel boards (horizontal boards at the base) ex
Post Fixing Methods
Post-mix concrete (Postcrete or similar): dig hole to 600mm deep (or 1/3 of total post length, whichever is greater), place post, pour dry Postcrete mix around post, add water, hold plumb for 3-4 minutes while it sets. 2-3 bags per post (20kg each). Fast, strong, permanent. Metal fence spikes: driven directly into firm ground, post slots into the sleeve. No concrete required — quicker and removable. Only suitable for firm, stone-free ground. Not recommended for tall or exposed fences. Not suitab
Post Length Selection
Total post length = above-ground height + depth in ground. Minimum in-ground depth: 600mm for standard 6ft fence (1/3 of above-ground height is a good rule). For 1.83m above ground: post length = 1.83 + 0.6 = 2.43m — round up to 2.4m (common stock length) and allow 10cm adjustment margin. Longer posts for sloped ground, soft soil, or exposed coastal/hillside sites. UK standard fence post sizes: 75×75mm timber (most common), 100×100mm (heavier panels or taller fences), or steel box sections for l
Planning Permission and Party Walls
In England, you can erect a fence up to 2 metres tall without planning permission on most residential properties (1 metre if adjacent to a highway or public footpath). Conservation areas and listed buildings may have additional restrictions. Party wall / boundary matters: always confirm the boundary line before installing a fence — use the title deeds or commission a boundary survey if uncertain. Fence posts must be on your side of the boundary line. Good practice: discuss with neighbours before
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