Why does Carpet matter?

The carpet area to order. Discuss roll width and seam placement with the supplier for an exact cut.

What are common carpet mistakes?

Ignoring roll width and the seams it forces.

🧶

100% free · no signupRuns in your browser

Carpet Calculator

Find carpet area and cost from room length and width.

Renovating a roomStep 5 of 5

Best for: Re-carpeting a room, hallway or stairs and budgeting materials.

Complete guide

Country (units):

Input

Length (m)Width (m)Price/m² (optional)Units

How it's calculated & sources

The Carpet 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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Where people usually head next.

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Square Footage Calculator

Calculate floor area from length and width, total multiple rooms, and convert to square metres.

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Paint Coverage Calculator

Estimate the liters of paint needed for any wall area and number of coats.

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Wallpaper Calculator

Calculate how many wallpaper rolls you need for any wall.

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Tile Calculator

Estimate floor or wall tile count including waste percentage.

Complete guide

Quick answers

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

What is Carpet?: A carpet calculator estimates the area of carpet needed for a room, with an allowance for cuts, seams and waste.
Why does Carpet matter?: The carpet area to order. Discuss roll width and seam placement with the supplier for an exact cut.
How is Carpet calculated?: The base area is length times width; add roughly 10% waste. Because carpet comes in fixed roll widths, fitting a room may need seams, which can add more material than the bare area suggests.
What are common carpet mistakes?: Ignoring roll width and the seams it forces.
When should you use the Carpet Calculator?: Re-carpeting a room, hallway or stairs and budgeting materials.

What is the Carpet Calculator?

A carpet calculator estimates the area of carpet needed for a room, with an allowance for cuts, seams and waste.

How the Carpet Calculator works

The base area is length times width; add roughly 10% waste. Because carpet comes in fixed roll widths, fitting a room may need seams, which can add more material than the bare area suggests.

Carpet needed by floor area (incl. 10% waste)

10 m²	11 m²	13.16 yd²
15 m²	16.5 m²	19.73 yd²
20 m²	22 m²	26.31 yd²
30 m²	33 m²	39.47 yd²
50 m²	55 m²	65.78 yd²

Common mistakes to avoid

Ignoring roll width and the seams it forces.
Leaving out a waste allowance.
Forgetting closets, bays and stairs.
Treating an irregular room as a simple rectangle.

Keywords: carpet, flooring, area.

Sources: General trade guidance

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

Frequently asked questions

Is the Carpet 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 Carpet Calculator?+

Carpet Calculator uses the standard carpet 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 Carpet Calculator runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Carpet 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 carpet calculator — instant, no signup

Body: Find carpet area and cost from room length and width. Try it: https://freetoolsgalaxy.com/tools/carpet-calculator

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Carpet Calculator on Free Tools Galaxy — Find carpet area and cost from room length and width. https://freetoolsgalaxy.com/tools/carpet-calculator

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# Carpet Calculator — the free tool I keep coming back to

Find carpet area and cost from room length and width.

Try it: https://freetoolsgalaxy.com/tools/carpet-calculator

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The fastest way is to use a free in-browser carpet calculator: https://freetoolsgalaxy.com/tools/carpet-calculator. Find carpet area and cost from room length and width.

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Complete guide

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What is the Carpet Calculator?

How the Carpet Calculator works

Carpet needed by floor area (incl. 10% waste)

Common mistakes to avoid

Frequently asked questions

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