How many 24" tiles for a 20×20 room?

111 tiles (12 boxes). Room area with 10% waste: 440 sq ft. Tile size: 24"×24". 10 tiles per box

Answer

111 tiles (12 boxes)

Room area with 10% waste: 440 sq ftTile size: 24"×24"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 24" tile = 4.00 sq ft. Tiles = 111.

Calculated using verified formulas. Last updated March 2026.