Fence Calculator
Calculate the number of fence posts, rails, pickets, and panels needed for any fence length. Supports common picket and panel fence styles.
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How to use this calculator
Number of posts = fence length / post spacing, rounded up, plus one end post. Pickets = total fence length / (picket width + gap).
- 1
Enter the total fence perimeter length and post spacing.
- 2
For panel fencing, enter the panel width to get panel count.
- 3
For picket fencing, enter picket width and gap between pickets.
- 4
Enter number of gates and gate width to exclude them from the calculation.
Frequently asked questions
How far apart should fence posts be?
Standard spacing is 1.8–2.4 m for timber panel fences. Post spacing should match panel width exactly for panel fences. For picket or rail fences, 2.4 m spacing is common. Closer spacing (1.5 m) provides more strength in exposed or windy locations.
How deep should fence posts be set?
A general rule is one-third of the post length below ground. For a 1.8 m fence, use 2.4 m posts set 600 mm deep in concrete. In unstable or wet soil, go deeper. Post depth affects wind resistance significantly.
Should I use concrete for fence posts?
Concrete provides the strongest base and is recommended for: heavy panel fences, exposed/windy locations, and corner or end posts. For lightweight picket fences in sheltered areas, post spikes (metal ground anchors) are a quicker alternative that also allows post replacement without digging.
Fence Calculator — Posts, Panels, Pickets & Rails
How to use the fence
Use this fence to he number of fence posts, rails, pickets, and panels needed for any fence length. Enter your values above and get your result in seconds. The tool is free, works on all devices, and keeps your data private — nothing is stored or shared.
How the fence works
The fence calculator uses standard formulas used in building projects, renovation planning, and material ordering. Enter your inputs, and the tool calculates the result instantly in your browser. No server-side processing means your data stays on your device. Results update in real time as you change inputs.
Choosing fence materials
Timber: natural look, needs treatment/painting every 3–5 years, moderate cost. Composite/WPC: low maintenance, 25+ year lifespan, higher upfront cost. Colorbond/metal: very durable, low maintenance, suits modern homes. Vinyl/PVC: no painting needed but can crack in extreme cold. Post height should be at least fence height + 600 mm for concrete footing.
Planning permission and boundaries
Most countries have height limits for fences without planning permission: typically 1.8–2 m at side and rear boundaries, 0.9–1 m at road frontages. Always confirm the exact boundary line with a surveyor before installation. Position fence posts inside your boundary line to avoid disputes.
Fence: how it works
Construction estimation tools save time and reduce material waste by calculating exact quantities before you buy. This tool uses standard industry formulas for accurate estimates across common building and renovation tasks.
Who uses this tool?
Contractors, DIY homeowners, quantity surveyors, and architects use it to generate material lists before requesting quotes. It supports better project planning and reduces the risk of costly underestimates.
Learn more from an authoritative source:
WikipediaConcrete Calculator
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →