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NumLuma› Home›Fence
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Fence Calculator

Estimate fence panels and posts from total fence length and panel width. See whole-panel count and a planning post estimate.

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Fence panels Live result
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Calculation breakdown
How to read this result

Treat the panel count as a first-pass material estimate. The post count is deliberately conservative only for a simple straight run and should be adjusted for the actual fence layout.

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How to use it

A clear result in a few inputs.

  1. Enter the requested values.Use consistent units and the real values for your scenario.
  2. Read the main result and breakdown.NumLuma recalculates immediately when an input changes.
  3. Check the formula and assumptions.Use the supporting context before making a real-world decision.

What this calculator does

A basic panel fence estimate starts with total run length and panel width. NumLuma rounds the panel count upward and estimates one more post than panels for a single straight run, while keeping the simplifying assumption explicit.

What to know before you use the result

  • The post estimate assumes one straight fence run.
  • Corners, gates, terminal posts and changes in direction can increase post count.
  • Actual panel spacing can differ from nominal panel width because of post dimensions and installation details.

Common mistakes to avoid

  • Using perimeter length without separately accounting for gates.
  • Assuming panels can always be cut without affecting post layout.
  • Using the straight-run post formula for a closed loop or multiple disconnected runs.

Where this calculation is useful

Privacy fencesGarden fencesProperty-line planningMaterial takeoffs

Related concepts

fence panelsfence postslinear feetpanel spacing
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Built to be understandable before it is impressive.

  • Formula shown clearly
  • No sign-up required
  • Mobile-first controls
  • Inputs processed locally
  • Plain-language result breakdown
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Assumptions & scope

Know what the number includes.

Post estimate assumes a straight run; corners, gates and closed perimeters can change the count.

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Home Project Calculators

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Quick answers

About the fence calculation.

How many fence panels do I need?

Divide the fence length by panel width and round up because a partial final section still requires material.

How many posts do I need?

For one straight run, a simple estimate is panels plus one. Corners, gates and multiple runs change that relationship.

Does this calculate concrete for posts?

No. Post-hole size, depth and local requirements must be estimated separately.