Tile Calculator
How many tiles a floor or wall needs — tile size, grout gap and 10% cutting waste included.
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Counting Tiles Properly
Each tile occupies (tile width + grout) × (tile height + grout) on the surface. Divide the area by that footprint and add waste for cuts — 10% is standard for straight layouts, 15% for diagonal patterns or rooms with many corners. Example: 10 m² of floor in 30×60 cm tile with a 3 mm joint → 55 tiles + 10% ≈ 61 tiles (~11 m² of material).
Buy the full amount from one production batch (lot number on the box) — later batches can differ visibly in tone. Keeping a few spares from the same lot saves future repairs.
Frequently Asked Questions
How many tiles per box?
Boxes list coverage in m² (commonly 1.0-1.5 m²). Divide the material total from this tool by the box coverage and round up.
Does grout width really matter?
On small tiles yes: a 20×20 cm tile with 3 mm joints needs ~3% fewer tiles than butt-jointed; on large formats the effect shrinks below 1%. The gap size is usually dictated by the tile spec — rectified tiles allow 2-3 mm, standard 3-5 mm.
Why 10% waste — I measured exactly?
Every wall meets at cuts, some cuts break, and patterns must align. Crews consider 10% the practical minimum; ordering exact area almost guarantees a second order in a different lot.
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