Tile Calculator
Enter your room and tile dimensions to calculate exactly how many tiles and boxes you need to buy, including a waste buffer for cuts.
Room dimensions (meters)
Tile size (centimeters)
A 10% waste buffer covers straight cuts. Increase to 15-20% for diagonal layouts, herringbone patterns, or rooms with many corners.
Frequently asked questions
How do I calculate how many tiles I need?
Divide the room's area by the area of one tile, then add a waste buffer (usually 10%) to cover cuts and breakage. For example, a 12 m² room with 30×30 cm tiles (0.09 m² each) needs about 133 tiles before waste, or roughly 147 with a 10% buffer.
How much extra tile should I buy for waste?
Most contractors recommend 10% extra for a straight, grid-aligned layout. Increase to 15-20% for diagonal layouts, herringbone patterns, small or oddly-shaped rooms, or if the tiles have a pattern that needs matching across pieces.
How do I estimate the cost of tiling a room?
Multiply the number of tiles needed (including waste) by the price per tile, then add grout, adhesive, and labor if you're hiring a professional. Tile alone typically runs from a few dollars per square foot for basic ceramic to $15+ for natural stone or designer porcelain.
Do I need to know the room's exact shape to use this calculator?
This calculator assumes a rectangular room. For L-shaped or irregular rooms, split the floor plan into rectangular sections, run the calculator for each section separately, and add the results together.
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See how your new tile floor looks before you buy a single box.
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