Carpet Calculator
Calculates carpet area and linear metres needed from room size, roll width and waste.
Enter Values
How to use this calculator
- Enter the room length and width.
- Enter the carpet roll width and a waste %.
- Read the area and linear metres of roll.
How it works
Area × (1 + waste%) ÷ roll width = linear metres. Carpet is sold by the linear metre off a fixed-width roll.
Worked example
5 × 4 m, 3.66 m roll, 10% waste. = 22 m² → about 6.0 linear metres.
Tips
- Runs entirely in your browser. Your inputs are not saved or transmitted.
Frequently asked questions
Why does roll width matter?
Carpet comes in fixed widths (often 3.66 m), so you buy whole-width lengths — plan seams carefully.
Privacy?
Runs entirely in your browser. Your inputs are not saved or transmitted.
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Cite this tool
Zerdly. (2026). Carpet Calculator. Retrieved from https://www.zerdly.com/tools/carpet-calculator/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.