Fence Post Calculator
Calculate posts, panels, and concrete for any fence run. Enter your total length and panel size to get exact quantities with concrete needed for setting.
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Fence Installation Guide
What's the key thing to understand about Post Depth Rule?
For fences up to 1.5m: minimum post depth of 450–600mm. For 1.8m fences: 600mm minimum, 750mm on exposed or windy sites. Rule of thumb: post depth = 1/3 of total post length. A 2.4m post (giving 1.8m above ground) needs 600mm buried.
What do I need to know about Concrete Quantities?
Each post hole typically needs a mix 300mm in diameter, 600mm deep = approximately 0.042 m³ = about 1.5 bags of 25kg postcrete. Postcrete is a rapid-set product that sets around the post in minutes when water is added.
What's the difference between Metal and Timber Posts?
Galvanised steel post spikes avoid concrete and can be quicker to install on firm ground. Metal posts last significantly longer than timber. For fence panels, steel H-frame posts designed for your panel size are the most secure and best-looking option.
What's the key thing to understand about Safety and Regulations?
Most structural and electrical DIY work in England and Wales must comply with Building Regulations and is notifiable to local Building Control. Work that is not notifiable (like-for-like replacements, cosmetic changes) can be done without notification. Notifiable work done without approval is technically illegal and can cause problems when selling the property. Electrical work in most rooms requires a Part P competent person or Building Control inspection. Gas work must always be performed by a Gas Safe registered engineer — it is illegal for anyone else to carry out gas work in the UK, and using an unregistered installer invalidates both your home insurance and any warranty on the work. For structural changes (removing load-bearing walls, altering the roof structure), always get a structural engineer's assessment before starting, even for jobs that look straightforward.