How many 12" tiles for a 20×20 room?

441 tiles (45 boxes). Room area with 10% waste: 440 sq ft. Tile size: 12"×12". 10 tiles per box

Answer

441 tiles (45 boxes)

Room area with 10% waste: 440 sq ftTile size: 12"×12"10 tiles per box

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How We Calculated This

Tiles = ceil((L × W × 1.10) / tile area)

Area = 20 × 20 = 400 sq ft. With 10% waste = 440 sq ft. Each 12" tile = 1.00 sq ft. Tiles = 441.

Calculated using verified formulas. Last updated March 2026.