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Carpet area

Calculate carpet area, waste and an approximate material cost for a room.

Built and maintained by The NumberPrism Editorial TeamEditorial policy

Your details

Room length (ft)

Room width (ft)

Carpet price per sq ft

Waste allowance (%)

Results update as you type. The formula and assumptions are explained below the calculator.

Carpet area to order

198 sq ft

Room area180 sq ft

Waste allowance10%

Carpet cost estimate$693.00

Price per square yard$31.50

Material-only estimate. Carpet is usually sold by the square yard, and rooms wider than the carpet roll need seams that add both cost and waste.

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What does this tool do?

Carpet is priced by area, so room size and a waste allowance decide the order. This calculator returns the area to buy and a material-only cost estimate, using a price per square foot.

The Formula

Carpet area = Room length × Room width × (1 + Waste %); Cost = Carpet area × Price per sq ft

Frequently Asked Questions

How much extra carpet should I order?

Add 10% for seams, trimming and pattern matching. Rooms wider than the carpet roll need more because of seaming.

Why is carpet priced by the square yard?

Most carpet is sold in square yards, so multiply the square-foot price by nine to compare quotes.

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