Enter your room size and tile size to find how many tiles you need — including a waste allowance for cuts and breakage.
How the tile calculator works
This tile calculator divides your floor or wall area by the size of one tile to find how many you need, then adds a waste percentage for cuts, breakage and future repairs.
Enter the room dimensions in feet and the tile size in inches (or centimetres) and it does the rest.
Using the calculator
- Enter the room length and width.
- Enter one tile’s size and units.
- Pick a waste allowance and read the number of tiles.
Formula reference
room area = length × width
one tile = tile L × tile W
exact = room area ÷ one tile
buy = exact × (1 + waste%)
Worked example
As an example, with a room length of 12, room width of 10, waste of 10% (recommended), the calculator returns a tiles needed of 132. Underneath, Room area comes out at 120 ft² and One tile covers at 1 ft². Change any field and every figure updates as you type.
FAQ
How much extra tile should I buy?
About 10% for a straight layout, and up to 15% for diagonal or patterned layouts that need more cuts.
How do I calculate tiles for a room?
Divide the room area by the area of one tile, then add waste. This calculator converts the units and rounds up for you.
Should I keep spare tiles?
Yes — keep a few from the same batch so future repairs match, since colours can vary between production runs.