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
Cuts, breakage, and mistakes. 10% is standard.
Result
Estimated deck cost
$5,689
Deck area (sq ft)
192
Decking linear feet
461
Decking material
$1,475
Framing material
$374
Labour
$3,840
Joists at 16 in OC
13
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter deck length (ft).
- 2Enter deck width (ft).
- 3Enter board width (in).
- 4Enter price per linear ft of board ($).
- 5Enter labour ($/sq ft).
- 6Enter waste allowance (%) — Cuts, breakage, and mistakes. 10% is standard..
- 7Read your estimated deck cost on the right — it updates as you type.
- 8Hit Share to keep the scenario or send it to someone.
About this calculator
Composite decking costs two to three times pressure-treated pine up front but skips staining every other year. This prices boards, framing, footings, and labour together.
Worked example
Using the values the calculator loads with:
Inputs
- Deck length: 16 ft
- Deck width: 12 ft
- Board width: 5.5 in
- Price per linear ft of board: 3.2 $
- Labour: 20 $/sq ft
- Waste allowance: 10 %
Results
- Estimated deck cost: $5,688.96
- Deck area (sq ft): 192
- Decking linear feet: 460.8
- Decking material: $1,474.56
- Framing material: $374.40
- Labour: $3,840.00
- Joists at 16 in OC: 13
What each field means
Inputs
- Deck length (ft)
- The deck length used in the calculation, measured in ft. Starts at 16 ft so you have a working example on load.
- Deck width (ft)
- The deck width used in the calculation, measured in ft. Starts at 12 ft so you have a working example on load.
- Board width (in)
- The board width used in the calculation, measured in in. Starts at 5.5 in so you have a working example on load.
- Price per linear ft of board ($)
- The price per linear ft of board used in the calculation, measured in $. Starts at 3.2 $ so you have a working example on load.
- Labour ($/sq ft)
- The labour used in the calculation, measured in $/sq ft. Starts at 20 $/sq ft so you have a working example on load.
- Waste allowance (%)
- Cuts, breakage, and mistakes. 10% is standard.
Results
- Estimated deck 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.
- Deck area (sq ft)
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Decking linear feet
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Decking material
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Framing material
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Labour
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Joists at 16 in OC
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the deck cost calculator work?
Composite decking costs two to three times pressure-treated pine up front but skips staining every other year. This prices boards, framing, footings, and labour together. The underlying maths is: Boards = Area ÷ (Board width × length), plus waste. Framing scales with joist spacing.
What do I need to enter?
6 values: deck length, deck width, board width, price per linear ft of board, labour, and waste allowance. 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 deck 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). Deck Cost Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/deck
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/deck" target="_blank" rel="noopener">Deck Cost Calculator — RevenueLab</a> (2026).</p>
Source: [Deck Cost Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/deck) (2026).