Tile Calculator BR
Work out how many tiles you need for a floor or wall from the area and the tile size, with a waste allowance.
How it works
Enter the area to cover and the size of one tile, choose a waste percentage, and optionally the tiles per box. The calculator returns the number of tiles and boxes required.
Frequently asked questions
How many tiles do I need?
Divide the area you are tiling by the area of a single tile, then add 10–15% for wastage. For a 12 m² floor with 0.18 m² tiles, that is about 74 tiles including wastage.
How many tiles per square metre?
Divide one square metre by the tile’s area. A 30×30 cm tile gives about 11 per m²; a 60×60 cm tile about 2.8 per m².
How much wastage should I add for tiles?
Around 10% for straight layouts and 15% for diagonal or patterned layouts, since those require more cuts.
How do I calculate tiles in square feet?
Work out the floor area in square feet and divide by the area of one tile in square feet. A 12×12 inch tile is 1 sq ft, so a 120 sq ft room needs about 120 tiles plus wastage.
How do I work out square metres for tiles?
Multiply the length by the width of the area in metres. A 4 m by 3 m room is 12 square metres.
How many tiles are in a box?
It varies by tile size — boxes usually state the coverage in square metres. Divide your total area (with wastage) by the coverage per box to get the number of boxes.
Do I measure walls and floors the same way?
Yes. For both, find the area to cover, divide by the area of one tile, and add wastage. Subtract large fixed features such as a window from wall areas.
Tile Calculator
Buying the right number of tiles avoids both a second trip to the shop and a pile of leftovers. This calculator divides the area you are tiling by the size of one tile and adds wastage — here is the method in full.
How many tiles do I need?
Number of tiles = area to tile ÷ area of one tile, then add a wastage allowance. Keep both areas in the same units (square metres or square feet).
How many tiles per m²?
Divide one square metre by the area of a single tile. A 30 × 30 cm tile covers 0.09 m², so you need about 11.1 tiles per m² (round up to 12 with wastage).
| Tile size | Tiles per m² |
|---|---|
| 20 × 20 cm | 25 |
| 30 × 30 cm | ~11.1 |
| 30 × 60 cm | ~5.6 |
| 60 × 60 cm | ~2.8 |
How much wastage to add
Add about 10% for straight layouts to cover cuts and breakages, and 15% for diagonal or patterned layouts where more tiles are cut.
Worked example
A 4 m × 3 m floor is 12 m². Using 30 × 60 cm tiles (0.18 m² each): 12 ÷ 0.18 = 66.7, round up to 67 tiles, then add 10% → about 74 tiles, which is usually a few full boxes.
Working in square feet
If your tiles are sold in inches, convert: a 12 × 12 inch tile is 1 sq ft, so a 120 sq ft floor needs about 120 tiles plus wastage. The division method is identical.
Don’t forget adhesive and grout
Buy adhesive and grout to match the tiled area; coverage is printed on the bag and depends on tile size and gap width.
Results are estimates for general guidance in Brazil and may not reflect the latest local rates, fees or rules. Check official sources before making decisions.