Tile Calculator
Work out how many floor tiles and boxes you need, including spare tiles for cuts. Free, no sign-up.
Written by the Arch.AI team · Maintained by Gio · Updated
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You need
Floor area 14.4 m² · 40 tiles laid + 4 spare
An estimate. Check the tiles per box printed by your supplier.
How to calculate how many tiles you need
Multiply the room length by its width to get the floor area. For example, a 4.5 × 3.2 m room is 14.4 m².
Divide the floor area by the area of one tile. A 60 × 60 cm tile is 0.36 m², so 14.4 m² needs 40 tiles.
Add spare tiles for edge cuts and breakage: 5–10% for a straight layout, about 15% for diagonal or herringbone. Then divide by the tiles per box and round up.
Typical tiles per box
| Size | Tiles/box | m²/box | Good for |
|---|---|---|---|
| 30 Ă— 30 cm | 11 | 0.99 | Bathrooms, terraces |
| 40 Ă— 40 cm | 6 | 0.96 | Bedrooms, kitchens |
| 50 Ă— 50 cm | 4 | 1.00 | Family rooms |
| 60 Ă— 60 cm | 4 | 1.44 | Living rooms |
| 60 Ă— 120 cm | 2 | 1.44 | Large rooms |
Tiles needed by size
Tiles for a 3 × 3 m room floor and a 2 × 2 m bathroom floor, including 10% spare for cuts (9.9 m² and 4.4 m²), rounded up. Divide by the tiles per box in the table above to get the number of boxes.
| Tile size | 3 × 3 m floor (9.9 m²) | 2 × 2 m floor (4.4 m²) |
|---|---|---|
| 25 Ă— 25 cm | 159 tiles | 71 tiles |
| 30 Ă— 30 cm | 110 tiles | 49 tiles |
| 40 Ă— 40 cm | 62 tiles | 28 tiles |
| 50 Ă— 50 cm | 40 tiles | 18 tiles |
| 60 Ă— 60 cm | 28 tiles | 13 tiles |
Frequently asked questions
How many 60x60 tiles are in a box, and how many m²?
Usually 4 tiles per box, or 1.44 m². So a 14.4 m² floor needs 10 boxes before spares. Box contents vary by brand, so check the packaging.
How many 40x40 tiles are in a box?
Usually 6 tiles per box, or 0.96 m². One 40 × 40 cm tile is 0.16 m². Box contents vary by brand, so check the packaging.
How many boxes of tiles do I need for a bathroom?
A 2 × 2 m bathroom floor is 4 m², or 4.4 m² with 10% spare. With 30 × 30 cm tiles (usually 11 tiles or 0.99 m² per box), that is 49 tiles or 5 boxes. For bathroom walls, calculate each wall separately as described below.
How much spare tile should I buy?
Add 5–10% for a straight layout and about 15% for diagonal or herringbone, because more tiles get cut. Keep a few spares for future repairs, since later production batches can differ slightly in colour.
My box holds a different number of tiles. What now?
Box contents vary by brand. Change the "Tiles per box" field to match the packaging or your supplier's information.
How do I calculate wall tiles?
Use the wall width as the length and the wall height as the width, then subtract doors and windows yourself. Calculate each wall separately.
Can I see the tiles in my room before buying?
Yes. Arch.AI's tile simulation shows an AI concept of your chosen tile on a photo of your own room, so you can compare options before you buy. Colour, pattern and tile size in the result can differ, so still check against physical samples. See the showroom example and workflow →
Before
After · AISee the tiles in your own room
Know how many you need? Upload a photo of your room, pick a pattern, and see an AI concept of it on your floor.
Try the tile simulation →