Tile Calculator
Pick the tile size (small, medium, large) and the area to cover. See a rough area with 10% waste allowance for cutting loss, plus the required number of boxes based on common box-coverage rates.
Optional: box contents vary by brand. Enter the m² printed on your own box and the calculation follows it.
The area and tile size are drawn to scale; the heavier grid lines separate the area covered by one box.
| Small Tile (20×25 cm)Selected | |
| Medium Ceramic (33×33 cm)Selected | |
| Large Ceramic (60×60 cm)Selected |
Optional. Enter the price you see at the store and we will total it up.
Enter the price per box
The total is simply your price multiplied by the number of boxes; labour and ancillary materials (adhesive, grout, trims) are not included.
We usually reply the same day.
Let's plan the right tile quantity and application together based on your space's real geometry and chosen laying patternThis is a rough illustration using a common reference box-coverage rate for the selected tile size; actual box content varies by brand and product line, and diagonal laying or complex room geometry can push the waste allowance up to 15%.
How is the required tile quantity calculated?
Tile quantity is calculated by dividing the area to be tiled (m²) by the area a single box covers. However, cutting loss (corners, door openings, pattern alignment) means a waste allowance of roughly 10-15% is typically added to the calculated area.
The tool above uses a common box-coverage rate for your selected tile size to show the area with a 10% waste allowance, plus the required number of boxes.
Common box-coverage rates by tile size
Small tiles (like 20×25 cm, typically used on bathroom walls) usually cover about 1 m² per box; medium ceramics (like 33×33 cm) cover about 1.5 m² per box; large ceramics (like 60×60 cm, preferred for floors and large surfaces) cover about 1.44 m² per box.
This tool uses a common reference rate for each size. Actual box content varies by brand and product line; the exact quantity should be based on the m²/box figure on the product packaging.
Why the waste allowance varies between 10-15%
A 10% waste allowance is usually enough for a straight laying pattern (tiles set in straight rows); diagonal laying, complex room geometry (many corners/niches), or products requiring pattern alignment can push the waste allowance up to 15%. This tool uses 10% for standard straight laying.
Let's plan the right tile quantity and application together based on your space's real geometry and chosen laying pattern.
Contact usFrequently Asked Questions
How many m² does one box of tiles cover?
The piece count and tile size per box vary by manufacturer; as a general tendency small tiles (20×25 cm) cover about 1 m²/box, medium ones (33×33 cm) about 1.5 m²/box and large ceramics (60×60 cm) about 1.44 m²/box. Always check the m² figure printed on the box before buying: your calculation depends on it.
How many boxes of tiles does a bathroom need, and how is it calculated?
Simple formula: Number of Boxes = (Area (m²) × 1.10) ÷ Box Coverage (m²/box). For example, a 20 m² area tiled with medium ceramics covering 1.5 m² per box needs (20 × 1.10) ÷ 1.5 ≈ 14.7 → 15 boxes. Enter your wall/floor area in the tool above to see the box count directly.
Why is a waste allowance added?
Cutting loss (corners, door/window openings, pipe penetrations) and pattern alignment mean actual consumption exceeds the calculated net area. A 10% allowance is recommended for straight laying, up to 15% for diagonal or complex patterns.
Why does the box-coverage rate vary by tile size?
While the number and size of tiles per box varies by manufacturer, small tiles (20×25 cm) generally cover about 1 m²/box, medium (33×33 cm) about 1.5 m²/box, and large ceramics (60×60 cm) about 1.44 m²/box.
Does this tool also recommend a tile brand or quality?
No. The tool only calculates the approximate number of boxes; brand, quality tier and pattern selection is a separate consideration based on the project's aesthetic and budget goals.