Flooring & Tiles

Carpet Quantity Calculator

Estimate carpet area and linear roll length with practical fitting waste.

Free interactive tool

Enter your details

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m
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Method & guidance

How the Carpet Quantity Calculator works

Adjusted floor area is divided by the chosen carpet-roll width to give linear metres.

How to use this tool

  1. Collect accurate values for room length, room width, roll width.
  2. Enter measurements in the displayed units and select the choices that match this project.
  3. Select Calculate / Generate, then compare the outputs with the stated Carpet Quantity Calculator method.
  4. Apply the result only after checking product specifications and real site conditions.

Example calculation or use case

For a worked Carpet Quantity Calculator example, use Room length = 5 m, Room width = 4 m, Roll width = 4 m, Fitting allowance = 10 %. The tool then applies this method: Adjusted floor area is divided by the chosen carpet-roll width to give linear metres.

Frequently Asked Questions

What information does the Carpet Quantity Calculator use?

It uses the measurements and choices shown in the form. Adjusted floor area is divided by the chosen carpet-roll width to give linear metres.

How accurate is the Carpet Quantity Calculator result?

The calculation is mathematically consistent with the stated assumptions. A fitter should confirm seam placement for rooms wider than the roll. Real products, site conditions, and supplier specifications can still change the final decision.

Should I include an allowance?

Use the result as a planning baseline and keep a sensible reserve for site variation, delivery, or fitting.

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