Calcvers
Tile Calculator
Surfaces & Finishes
Generated
September 24, 2026
Tiles needed
147tiles
12 m² + 10% waste
Your inputs
- Currency
- USD ($)
- Area length
- 4 m
- Area width
- 3 m
- Tile width
- 30 cm
- Tile length
- 30 cm
- Waste / overage
- 10 %
- Tiles per box
- 0 tiles
Breakdown
- Without waste
- 134 tiles
- Waste added
- +14 tiles
- Coverage
- 12 m²
What this means
The number of tiles is the area you're covering divided by the area of one tile, plus a waste allowance. Waste covers the tiles you'll cut at edges and around fixtures, plus the odd breakage — 10% is typical for a straight layout, more for diagonal or intricate patterns.
Recommendations
- Add 10% waste for a standard grid, 15–20% for diagonal layouts or rooms with lots of cuts.
- Buy all your tiles in one batch to avoid shade variation between production runs.
- Keep a few spare tiles after the job for future repairs.
Watch out
- This assumes rectangular tiles laid edge-to-edge. Grout lines are negligible for counting but mosaic sheets and patterns change the maths.