Should I really add cutting waste?

Yes. Rooms have corners, doorways and pipe cuts; 5% covers straightforward layouts while diagonal or herringbone patterns need 10 to 15%.

How much adhesive do I need?

The calculator assumes about 4 kg/m² for a 6 mm notch trowel on a flat surface. Uneven substrates and large-format tiles need more.

Yes - grout covers the joints. Narrow joints use less; a 3 mm joint over 20 m² typically takes 1 to 2 kg depending on tile thickness.

Tile Calculator - Tiles & Adhesive for Floors and Walls

Count tiles with joints and cutting waste, and size the adhesive, for any room area.

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How This Was Calculated

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Buy the Right Number of Tiles the First Time

Different tile batches vary in shade, so running short mid-job is more than an inconvenience. AiLoveKit's tile calculator counts tiles from your area and chosen size, adds joint spacing and cutting waste, and sizes the adhesive - so one order covers the whole room.

Quick Planning Rules

Straight lay - add 5% waste.
Diagonal or patterned - add 10 to 15%.
Keep spare tiles - store 2 or 3 full tiles for future repairs.