Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Estimated material cost
$1,786
Posts
20
Pickets
328
Rails
57
Sections
19
Concrete bags (60 lb)
30
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter fence length (ft).
- 2Enter post spacing (ft).
- 3Enter picket width (in).
- 4Enter picket gap (in).
- 5Enter rails per section.
- 6Enter cost per post ($).
- 7Enter cost per picket ($).
- 8Read your estimated material cost on the right — it updates as you type.
- 9Hit Share to keep the scenario or send it to someone.
About this calculator
Post spacing sets everything else. Eight-foot spacing is the default for wood privacy fence; six feet is better in high-wind areas.
Worked example
Using the values the calculator loads with:
Inputs
- Fence length: 150 ft
- Post spacing: 8 ft
- Picket width: 5.5 in
- Picket gap: 0 in
- Rails per section: 3
- Cost per post: 14 $
- Cost per picket: 3.2 $
Results
- Estimated material cost: $1,786
- Posts: 20
- Pickets: 328
- Rails: 57
- Sections: 19
- Concrete bags (60 lb): 30
What each field means
Inputs
- Fence length (ft)
- The fence length used in the calculation, measured in ft. Starts at 150 ft so you have a working example on load.
- Post spacing (ft)
- The post spacing used in the calculation, measured in ft. Starts at 8 ft so you have a working example on load. Accepted range: 4–10 ft.
- Picket width (in)
- The picket width used in the calculation, measured in in. Starts at 5.5 in so you have a working example on load.
- Picket gap (in)
- The picket gap used in the calculation, measured in in. Starts at 0 in so you have a working example on load. Accepted range: 0–4 in.
- Rails per section
- The rails per section used in the calculation. Starts at 3 so you have a working example on load. Accepted range: 2–4.
- Cost per post ($)
- The cost per post used in the calculation, measured in $. Starts at 14 $ so you have a working example on load.
- Cost per picket ($)
- The cost per picket used in the calculation, measured in $. Starts at 3.2 $ so you have a working example on load.
Results
- Estimated material cost
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Posts
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Pickets
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Rails
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Sections
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Concrete bags (60 lb)
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the fence post, panel & cost calculator work?
Post spacing sets everything else. Eight-foot spacing is the default for wood privacy fence; six feet is better in high-wind areas. The underlying maths is: Posts = length ÷ spacing + 1; pickets = length × 12 ÷ (picket width + gap).
What do I need to enter?
7 values: fence length, post spacing, picket width, picket gap, rails per section, cost per post, and cost per picket. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the estimated material cost result mean?
It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary.
Who is this tool for?
It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Fence Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/fence-calculator
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/fence-calculator" target="_blank" rel="noopener">Fence Calculator — RevenueLab</a> (2026).</p>
Source: [Fence Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/fence-calculator) (2026).