How much extra flooring should I buy?

Add 10% for a standard straight install, or 15% for diagonal or complex layouts, to cover cuts and mistakes.

Why keep a spare box?

Flooring dye lots vary between batches. A spare box from the same lot makes future repairs match.

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Square footage and boxes for a flooring project.

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Room length (ft)Room width (ft)Waste factorCoverage per box (sq ft)

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How much extra flooring should I buy?: Add 10% for a standard straight install, or 15% for diagonal or complex layouts, to cover cuts and mistakes.
Why keep a spare box?: Flooring dye lots vary between batches. A spare box from the same lot makes future repairs match.