Tile Calculator
Calculate how many tiles you need for flooring or wall tiling. Includes wastage allowance.
Tiles Required
How to use the Tile Calculator
- Enter the floor length and width in metres.
- Enter the tile length and width in centimetres.
- Click Calculate to see tiles needed, tiles with 10% waste and boxes.
- Check how many tiles your chosen box actually contains and adjust.
Formula used
Worked example
Room 4 m × 3 m
Floor area = 12 m²
With 60 × 60 cm tiles (0.36 m²): 34 tiles exact, 38 with 10% waste (about 10 boxes of 4)
With 30 × 30 cm tiles (0.09 m²): 134 tiles exact, 148 with waste
How much wastage to allow
A 10% allowance suits straight-laid tiles in a simple rectangular room. Use 15% for diagonal or herringbone patterns, many corners or small rooms like bathrooms, and keep a few spare tiles from the same batch for future repairs — shades vary between production lots.
Tips for accurate results
- For walls, multiply wall length by height and subtract doors and windows.
- Large-format tiles need a flat floor and the right adhesive.
- Buy all tiles from the same batch number to avoid colour differences.
Frequently Asked Questions
A 2×2 ft tile covers 4 sq ft, so 25 tiles plus 10% waste = about 28 tiles.
Grout lines of 2–3 mm make little difference to the count; the wastage allowance covers them.
Split it into two rectangles, calculate each and add the results.
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Content reviewed by Vinod, Easy Smart Calculator · Last updated October 2026