Fence Calculator
Prepare fence length, post spacing, panel, picket, rail, gate, and waste inputs for a fence material estimate.
Enter measurements below. The result updates as you type.
Calculation breakdown
Usable run
96 ft total - 4 ft gates
Sections
Usable fence is split into independent runs at gates, then rounded conservatively because exact gate positions are not entered.
Posts
Straight run uses endpoints plus line and gate posts.
Waste
Panels, rails, and pickets include 10% planning waste where applicable.
More Fencing help
Related calculators and guides
Open the project hub for nearby tools, measurement guidance, and published articles.
Formula explanation
Core fence estimate basis
Usable length = total fence length - gates; sections = usable length / post spacing
- The live engine should round up section and material counts.
- Gate openings should be deducted or treated separately from straight runs.
- Post-count logic must account for ends and layout transitions.
Example structure
Straight run example
96 ft fence run with 8 ft section spacing
- 1Divide the run length by the planned section spacing.
- 2Round sections up when needed.
- 3Add posts based on the final layout rules.
Base sections: 12, before gate or terminal post adjustments.
Assumptions to verify
Before this calculator goes live
- Corner, end, gate, and terminal posts need explicit handling.
- Panel and picket formulas differ and are calculated by fence style.
- Terrain, layout breaks, and local code may change post depth or spacing.
Measurement checklist
How to measure
- For straight runs, measure the total fence path from end to end.
- For a closed rectangular perimeter, measure the outside length and width.
- Measure gate openings separately and enter the number of gates plus width per gate.
- Use the planned post spacing, panel width, picket width, and picket gap from your product or layout.
Avoid these errors
Common mistakes
- Counting gate openings as usable fence length.
- Using panel formulas for individual picket fences.
- Forgetting extra gate posts or corner posts on perimeter layouts.
- Assuming post spacing can exceed local code, product, or site requirements.
Estimate disclaimer
Verify before ordering.
Use the output as a planning baseline. Site conditions, product coverage, waste, supplier units, installation method, and local requirements can change the final quantity.
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Published guides
Understand the measurements and assumptions
Supporting guide
How Many Fence Posts Do I Need?
Calculate fence posts from usable fence length, chosen spacing, layout type, endpoints, corners, gates, and material style.
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Supporting guide
How Much Concrete Do I Need per Fence Post?
Estimate concrete for fence-post holes with a cylinder formula, bag-yield checks, and links to the fence and concrete calculators.
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Supporting guide
Fence Cost per Foot: Length, Posts, Gates, and Material Scope
Compare fence cost per foot with the measurement and material assumptions that make wood, vinyl, chain-link, and gate quotes different.
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Common questions
Use the result with context
01Will the calculator support panels and pickets?+
Yes. Wood/privacy mode estimates panels, while picket mode estimates individual pickets from picket width plus gap.
02How should gates be handled?+
Gate openings are deducted from usable fence length, and two gate posts are added per gate.
03Can this replace a code check?+
No. Fence height, setbacks, post depth, and permit rules may depend on local requirements.