Concrete Calculator
Estimate volume and bag count for a rectangular slab.
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Tile Calculator
Estimate tiles and full boxes, with a waste allowance.
02EXAMPLE RESULT
Tiles required
245
tiles
Full boxes to buy25boxes
Tiles in full boxes250tiles
Area including waste allowance22m²
Coverage from full boxes22.5m²
Results update as you type. Calculate adds a snapshot to your history.
How this calculation works
Both tile and box quantities round upward. This area estimate does not subtract grout joints or model the layout; intricate cuts and diagonal patterns can need more waste.
Tiles = ceiling(area × (1 + allowance ÷ 100) ÷ area of one tile)
Your calculation, step by step
- Tile area = (30 ÷ 100) × (30 ÷ 100) = 0.09 m².
- Tiles = ceiling(22 ÷ 0.09) = 245.
- Boxes = ceiling(245 ÷ 10) = 25.
A worked example
20m² of 30cm × 30cm tiles with 10% extra needs 245 tiles, or 25 boxes of 10.