Tile Calculator
A tile calculator estimates the total number of ceramic or porcelain floor and wall tiles needed based on room dimensions and individual tile sizes. By accounting for grout joint widths and a 10% cutting-waste factor, it shows that tiling a 100-square-foot room with 12x12 tiles requires 110 tiles.
By Sofia Marchetti (Home & Wellness Reviewer) · Reviewed by Daniel OkoroUpdated · Published
Length (ft)
0ft
Width (ft)
0ft
Cost / sq ft
$
0
TOTAL AREA
0.0 sq yd
How Does the Tile Calculator Work?
- Enter total surface area to be tiled in square feet.
- Select common tile size (e.g. 12"×12", 12"×24", 3"×6" subway, 6"×6") or enter custom inches.
- Add waste percentage (10% straight grid, 15% staggered/diagonal).
What Is the Tile Formula?
Tile Count = (Area Sq Ft / Tile Area Sq Ft) × (1 + Waste% / 100)
Calculates raw tile count and adds 10-15% for corner cutting and breakage.
Variables
Tile Count:Total individual tiles
How Do You Calculate Tile Step by Step?
Tiling an 8×10 ft bathroom floor (80 sq ft) with 12×12 inch tiles and 10% wasteArea: 80 sq ft
Tile Size: 12" × 12"
Waste: 10%
Tile area: 12 × 12 = 144 sq in = 1.0 sq ft per tile
Base tiles: 80 sq ft ÷ 1.0 = 80 tiles
With 10% waste: 80 × 1.10 = 88 tiles needed
Final Solution:88 Tiles (88 sq ft total)
Tile Questions and Answers
Since each 12x12 tile is exactly 1 square foot, you need 100 tiles plus 10% waste, giving a recommended order of 110 tiles.
Where Do These Tile Standards Come From?
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