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Construction Calculators

Carpet Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
m
m
%
Verified formula Private

Carpet area needed

22.00

Estimated cost
₹13,200.00

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Carpet Calculator

The Carpet Calculator works out your carpet area needed, along with 1 related figure in an instant. Enter room length, room width and wastage allowance and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the room length.
  2. Enter the room width.
  3. Enter the wastage allowance.
  4. Enter the price per square metre.
  5. Read off your carpet area needed, together with estimated cost — the calculator updates automatically, with no button to press.

Formula

The Carpet Calculator uses the formula:

Carpet area needed = Room length × Room width × (1 + Wastage allowance ÷ 100)

Worked example

For example, with room length of 5 m, room width of 4 m, wastage allowance of 1% and price per square metre of 600, the carpet area needed is 22.00.

Inputs used
Room length 5 m
Room width 4 m
Wastage allowance 1%
Price per square metre 600
Results
Carpet area needed 22.00
Estimated cost ₹13,200.00

Results are estimates for educational use, not professional advice.

Key terms explained

Area
The amount of two-dimensional space a shape covers, measured in square units.

Frequently asked questions

Multiply room length by width for the floor area, then add a wastage allowance for cuts and matching. A 5 by 4 m room with 10% waste needs 22 m².

Carpet comes in fixed widths and patterns must align, so some material is trimmed. Around 10% covers most rooms.

Multiply the carpet area, including wastage, by the price per square metre.

Yes. Measure the longest length and widest width, including alcoves and doorways, so the carpet fits everywhere.

Enter the room length. Enter the room width. Enter the wastage allowance. Enter the price per square metre. Read off your carpet area needed, together with estimated cost — the calculator updates automatically, with no button to press.

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