Stable Numbers
Tile Calculator
Estimate how many tiles and boxes you need for a floor or wall. Enter the area, tile size, optional grout gap, a sensible wastage margin and tiles per box. The tool gives a clear total with round-up amounts for buying.
Openings (subtract from wall area)
Typical UK door ~1.9–2.2 m².
Enter the face size of one tile.
Optional. Used only if “Include in layout” is on.
Treats each tile as tile size + gap for a realistic layout module.
Covers cutting and spares. 10–15% is common.
Area summary
- Gross area:
- Openings excluded:
- Net area to tile:
Tile quantity
- Tiles per :
- Tiles needed (exact):
- Wastage:
- Tiles to buy (rounded):
- Boxes to buy: (x tiles)
Results are estimates. Edge cuts vary in real rooms and patterns. Always check with your tiler and supplier stock.
About this calculator
The calculator multiplies your length by width to get area, subtracts openings for walls if supplied, then divides by the effective tile module. If you turn on the grout option it treats each tile as its face size plus the grout gap on both edges, which better reflects a grid layout. Finally it adds your wastage and rounds up to whole tiles and boxes.
Tile sizes and grout gaps are labels in the units you choose. Internally we convert to metres for consistent area maths, then present results back in your chosen area unit.
Explore more in the calculators hub.