The calculator divides your floor or wall area by the tile size, adds a wastage allowance for cuts, and rounds up to whole boxes. Standard sizes (300×300, 600×600, 800×800 mm) are pre-loaded.
What is Tile?
Tile estimation comes down to: how much area, what size tile, and how much extra to allow for cuts at edges. The math is simple division, but the tricky part is the wastage allowance — 10% for straight-cut floor tiles, more for diagonal layouts or rooms with many corners.
Tiles are sold in boxes. The number of tiles per box depends on the size — 4 tiles per box of 600×600, 9 per box of 300×300. The calculator rounds up to whole boxes since you can't buy partial.
Always keep 1-2 spare boxes after the project. Tile colour batches change over time — matching exact shades for repairs after a few years can be impossible.
Area ÷ tile size, rounded up to boxes
- Area
- Floor or wall area—L × W in m²
- tile_area
- Per-tile area—tile L × W in m²
How to use this calculator
Enter the area, pick tile size and box count, set wastage.
Enter floor or wall area
Length × width in metres. For multi-room layouts, calculate each room separately.
Pick tile size
Common: 300×300, 600×600, 800×800, 1000×1000 mm. Larger tiles = fewer joints + faster laying but higher wastage on cuts.
Enter tiles per box
Check the box label — varies by tile size. 600×600 typically 4 per box. Calculator rounds up to whole boxes.
Set wastage
10% standard, 15-20% for diagonal layouts or rooms with many corners and cuts.
Common tile projects
Bathroom walls + floor
Calculate walls and floor separately. Different tile sizes are common (smaller on walls, larger on floor).
Living room floor
Most common project. Big-format tiles (800×800 or 1000×1000) for fewer joints; smaller (600×600) for easier handling.
Kitchen backsplash
Small mosaic or 200×200 tiles for visual interest. Higher waste % due to small cuts.
Outdoor patio / verandah
Anti-skid tiles, often 300×300 vitrified. Calculator works the same way.
Glossary
- Vitrified tile
- Highest-density ceramic tile — water-resistant, durable. Common for floors.
- Wastage
- Buffer % to account for cuts at edges, breakages during laying, and trim pieces.
- Batch number
- Manufacturing batch identifier on each box. Same batch = same colour shade.