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Fence Calculator

Calculate fence posts, panels and material cost for any perimeter.

Best for: Budgeting a garden or boundary fence, comparing quotes against materials, or sizing a repair after a storm.

Complete guide
Country (units):

Input

How it's calculated & sources
The Fence Calculator uses the standard method for this calculation. It runs entirely in your browser, so your inputs are never uploaded. Last reviewed June 2026.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

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Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Fence?
The Fence Calculator turns a perimeter length into a shopping list: posts, panels/rails and estimated material cost.
Why does Fence matter?
A per-run material estimate. Every corner ends one run and starts another (sharing a corner post), and every gate consumes its own posts — the sketch matters more than the arithmetic.
How is Fence calculated?
Posts = ceil(length ÷ post spacing) + 1 per run (corners and gates add posts); panels = spans between posts; cost multiplies quantities by your unit prices. Formula: posts per run = ceil(length / spacing) + 1; panels = posts − 1.
What are common fence mistakes?
Forgetting the +1 end post per straight run.
When should you use the Fence Calculator?
Budgeting a garden or boundary fence, comparing quotes against materials, or sizing a repair after a storm.

What is the Fence Calculator?

The Fence Calculator turns a perimeter length into a shopping list: posts, panels/rails and estimated material cost.

How the Fence Calculator works

Posts = ceil(length ÷ post spacing) + 1 per run (corners and gates add posts); panels = spans between posts; cost multiplies quantities by your unit prices.

posts per run = ceil(length / spacing) + 1; panels = posts − 1
  1. Measure the total fence length (walk each side; sketch corners and gates).
  2. Set post spacing — 6-8 ft (1.8-2.4 m) is standard for most panel fencing.
  3. Enter unit prices for posts and panels/rails.
  4. Read quantities and cost; add 5-10% wastage before ordering.

Fence posts and panels by perimeter (8 ft spacing)

40 ft56
80 ft1011
120 ft1516
160 ft2021

Common mistakes to avoid

  • Forgetting the +1 end post per straight run.
  • Ignoring slopes — sloped ground needs stepped or raked panels and more length than the plan view shows.
  • Ordering exact counts with no wastage margin.
  • Skipping the call-before-you-dig utility check where required.

Keywords: fence, posts, panels, perimeter.

Estimates for planning; local codes may govern fence height and post depth.

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Fence Calculator free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Fence Calculator?+

Fence Calculator uses the standard fence formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Fence Calculator runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Fence Calculator on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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Title: I built/used this free fence calculator — instant, no signup

Body: Calculate fence posts, panels and material cost for any perimeter. Try it: https://freetoolsgalaxy.com/tools/fence-calculator
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Fence Calculator on Free Tools Galaxy — Calculate fence posts, panels and material cost for any perimeter. https://freetoolsgalaxy.com/tools/fence-calculator
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# Fence Calculator — the free tool I keep coming back to

Calculate fence posts, panels and material cost for any perimeter.

Try it: https://freetoolsgalaxy.com/tools/fence-calculator
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The fastest way is to use a free in-browser fence calculator: https://freetoolsgalaxy.com/tools/fence-calculator. Calculate fence posts, panels and material cost for any perimeter.

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[Fence Calculator — free online tool](https://freetoolsgalaxy.com/tools/fence-calculator)

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