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
Total installed cost
$1,068
Square yards to order
25.4
Carpet cost
$712
Padding cost
$153
Labour cost
$203
12 ft roll check
Seam required
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter room length (ft).
- 2Enter room width (ft).
- 3Enter carpet price ($/sq yd).
- 4Enter padding price ($/sq yd).
- 5Enter install labour ($/sq yd).
- 6Enter waste allowance (%) — Cuts, breakage, and mistakes. 10% is standard..
- 7Read your total installed cost on the right — it updates as you type.
- 8Hit Share to keep the scenario or send it to someone.
About this calculator
Carpet is priced by the square yard and comes in 12 ft rolls, so rooms wider than 12 feet need a seam and generate more offcut than the raw area suggests.
Worked example
Using the values the calculator loads with:
Inputs
- Room length: 16 ft
- Room width: 13 ft
- Carpet price: 28 $/sq yd
- Padding price: 6 $/sq yd
- Install labour: 8 $/sq yd
- Waste allowance: 10 %
Results
- Total installed cost: $1,067.73
- Square yards to order: 25.4
- Carpet cost: $711.82
- Padding cost: $152.53
- Labour cost: $203.38
- 12 ft roll check: Seam required
What each field means
Inputs
- Room length (ft)
- The room length used in the calculation, measured in ft. Starts at 16 ft so you have a working example on load.
- Room width (ft)
- The room width used in the calculation, measured in ft. Starts at 13 ft so you have a working example on load.
- Carpet price ($/sq yd)
- The carpet price used in the calculation, measured in $/sq yd. Starts at 28 $/sq yd so you have a working example on load.
- Padding price ($/sq yd)
- The padding price used in the calculation, measured in $/sq yd. Starts at 6 $/sq yd so you have a working example on load.
- Install labour ($/sq yd)
- The install labour used in the calculation, measured in $/sq yd. Starts at 8 $/sq yd so you have a working example on load.
- Waste allowance (%)
- Cuts, breakage, and mistakes. 10% is standard.
Results
- Total installed 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.
- Square yards to order
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Carpet cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Padding cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Labour cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- 12 ft roll check
- Returned as a plain value. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the carpet calculator work?
Carpet is priced by the square yard and comes in 12 ft rolls, so rooms wider than 12 feet need a seam and generate more offcut than the raw area suggests. The underlying maths is: Square yards = Area (sq ft) ÷ 9, plus waste for seams and cuts.
What do I need to enter?
6 values: room length, room width, carpet price, padding price, install 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 total installed 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). Carpet Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/carpet
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/carpet" target="_blank" rel="noopener">Carpet Calculator — RevenueLab</a> (2026).</p>
Source: [Carpet Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/carpet) (2026).