Flooring for a 16×20 Room

A 16×20 room is 320 sq ft, so buy about 18 boxes (10% waste) plus 4 underlayment roll. Set your box coverage below — it varies a lot by product.

Flooring boxes

18 boxes

Floor area

320 sq ft

Coverage needed

352 sq ftincludes 10% waste

Coverage purchased

360 sq ft18 whole boxes; 8.0 sq ft beyond allowance

Boxes

18 boxes~20 sq ft per box (check yours)

Underlayment

4 rolls100 sq ft foam rolls; check product requirements

Flooring cost (est.)

$810$2.25/sq ft × 360 sq ft purchased

How this estimate works

Room area × (1 + waste % ÷ 100) gives coverage needed. Divide by box coverage and round up to whole boxes. Cost uses whole boxes × box coverage × your price per sq ft. Start at 10% waste for a simple layout; complex cuts may need more.

Optional underlayment rounds up to 100-sq-ft rolls at a sample $35 per roll. Turn it off for attached-pad products or when separate foam is not permitted. Trim, transitions, adhesives, removal, and subfloor repairs are not included; edit supplier prices in My Projects.

Planning estimate. Adjust allowances and sample prices for your supplier; tax, delivery, and labor are not included.

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Flooring for a 16×20 Room

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