This tile calculator estimates how many tiles you need for a floor or wall from area, tile size, and waste.
Construction
Tile Calculator
Estimate tile count from coverage area, tile size and waste factor.
Calculator
About this calculator
Formula notes
tiles = ceil(area × (1 + waste%) / tile area). Tile area = tile length × tile width.
Worked examples
- Example: 10 m² with 40×40 cm tiles (0.16 m² each) and 10% waste needs ceil(11/0.16) = 69 tiles.
- A 12 m2 surface using 300 mm x 600 mm tiles needs 66.67 tiles theoretically; with 10% waste, round up to at least 74 tiles.
How to use it
- Enter the area to cover.
- Enter the tile dimensions.
- Add waste for cuts and breakage, then read the tile count.
Frequently asked questions
Do grout lines change the count?
Only slightly; 2–3 mm grout lines reduce needed tiles by about 1–2%.
How much waste for small tiles?
Small tiles cut less waste per piece — 7% is often enough versus 10% for large tiles.
Limits and interpretation
- The geometric count omits grout-joint layout, edge cuts, pattern repeats, niches, and unusable partial tiles.
- Order by complete boxes and verify shade/calibre batch information; the calculated tile count is not the purchase unit.