Carpet is sold in square yards — let's convert your room dimensions correctly.
1 sq yard = 9 sq ft.
Always add 10–15% for seams and cuts.
This tool is most valuable when estimating materials for a full project scope. Run the calculation for each area or surface separately, then total the results to produce a complete materials list with a built-in waste allowance.
A common error is measuring irregular rooms or surfaces as simple rectangles. Recesses, alcoves, and non-right-angle corners require either decomposing the area into simpler shapes or using actual measured dimensions rather than approximations.
A homeowner tiles a 4.2m × 3.8m bathroom floor using 600mm × 600mm tiles. The calculator estimates 47 tiles needed plus a 12% waste allowance — recommending an order of 53 tiles to account for cuts around the perimeter and a spare in case of breakage.
10 × 12 = 120 sq ft ÷ 9 = 13.3 sq yd + 10% waste = 14.7 sq yd.
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