Why add wastage to tile calculations?

Tile breakage, cuts at edges, and trimming around fixtures account for 10% wastage on average. Always round up so you don't run short.

What tile sizes are most common?

Common floor tiles: 300×300 mm, 600×600 mm, 450×450 mm. Common wall tiles: 300×300 mm, 300×600 mm (subway). Porcelain tiles usually come in 10–20 pieces per box; terracotta in 6–12 pieces per box.

Should I order tiles in boxes or individually?

Always order in complete boxes. It's cheaper, ensures consistent color/batch, and wastes are factored in (10%). One box typically covers 0.6–1.5 m² depending on tile size.

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How this calculator works

Tile calculation starts with room area. Multiply length × width in the same units (meters or feet) to get m² or ft². Divide that by the tile area (tile length × width) to get the number of tiles needed.

Add wastage — typically 10% for straight edges, 15% for complex patterns. Tiles break during cutting, fitting around fixtures, and handling. Always round up. Divide the final tile count by tiles-per-box (check your product sheet) to get boxes to order.

Standard floor tiles: 300×300 mm (10–20 pieces/box, ~1 m² coverage)
Large format tiles: 600×600 mm (6–10 pieces/box, ~2.5 m² coverage)
Subway tiles: 300×600 mm (8–12 pieces/box, ~1.8 m² per box)
Always check your product box — coverage varies by thickness and joint size

Common room sizes and tile requirements

Room type	Area (m²)	300×300 tiles	Boxes (10/box)
Bathroom	4 m²	44 (with 10% waste)	5 boxes
Kitchen	8 m²	88	9 boxes
Living room	20 m²	220	22 boxes
Bedroom	12 m²	132	14 boxes
Entryway/Hallway	6 m²	66	7 boxes

Add 10–15% extra depending on pattern complexity and your comfort level.

Frequently asked questions