Tile Calculator

Calculate how many tiles to order for any project from the room dimensions, tile size, and a waste allowance.

Tiles Needed
— tiles
Rounded up.

Usage Tip

Buy from one production lot so shade and size match, and keep a few spare tiles for future repairs.

THE MATH
room area = length × width
tile area = (tile L ÷ 12) × (tile W ÷ 12)
tiles = round up( room area ÷ tile area × (1 + waste ÷ 100) )
Tile count depends on the room area and the size of each tile. Smaller tiles mean more pieces; a waste allowance covers edge cuts and breakage.
Enter the room dimensions in feet and the tile dimensions in inches, plus a waste percentage (10 percent typical, 15 for diagonal layouts).
The result rounds up to whole tiles.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.