Tile Calculator

Estimate how many tiles to buy for a rectangular floor or wall area. The calculator supports room measurements in feet with tile dimensions in inches, or room measurements in meters with tile dimensions in centimeters.

How to use this calculator

Choose the measurement system, enter room length and width, enter tile length and width, then choose layout complexity. Results include total tiles to purchase, room area, tile size, tile area, base tiles, and extra tiles from waste.

Formula

The calculator converts each tile to the same area unit as the room:

$base\ tiles = ceiling(room\ area \div tile\ area)$

$total\ tiles = ceiling(base\ tiles \times (1 + waste\ percent))$

For a 12 ft by 10 ft room using 12 inch by 12 inch tile, room area is 120 sq ft and each tile is 1 sq ft. A moderate 15 percent layout gives 120 base tiles and 138 tiles total.

Layout tips

Use a higher waste factor for diagonal layouts, many corners, or patterned tile. Keep attic stock for repairs because dye lots change. For wall paint around tiled areas, use the paint calculator, and for initial area checks use the square footage calculator.