Buying the right amount of tile matters. Too little and you risk a second batch that doesn't quite match; too much and you've tied up money. Here's the reliable way to get it right.
The formula
- 1.Measure the area. Length × width in metres gives your floor area in square metres (m²). For walls, do each wall (height × width) and add them up.
- 2.Add a waste allowance. Add ~10% for normal cuts and breakages (12–15% for diagonal or patterned layouts).
- 3.Divide by the carton coverage. Each tile size covers a set number of m² per carton (shown on every product page). Divide your total by that and round up to whole cartons.
Worked example
- Room: 4 m × 5 m = 20 m²
- Add 10% waste: 20 × 1.1 = 22 m²
- Tile coverage: 1.44 m² per carton
- 22 ÷ 1.44 = 15.3 → round up to 16 cartons
Coverage varies by tile size — always use the figure on the product page for your chosen tile.
Skip the maths
Our free Instant Quotetool does all of this for you. Enter your dimensions, upload a photo of the room, or snap your tiler's measurement sheet — and get a per-area carton breakdown in seconds, ready to turn into an order on WhatsApp.
Common questions
How much extra tile should I buy?
Add about 10% to your measured area for cuts and breakages. For diagonal layouts, herringbone, or rooms with many corners, allow 12–15%. Always keep a spare box or two from the same batch for future repairs.
How do I calculate tiles for an irregular room?
Split the room into simple rectangles, work out each area (length × width), add them together, then add your waste allowance. Easier still: use our free Instant Quote tool and upload a photo or your tiler's measurement sheet.
How many tiles are in a carton?
It depends on tile size. Rather than counting tiles, work in square metres: each product page lists the coverage per carton (m²). Divide your total area (plus waste) by that number and round up to whole cartons.
Should all my tiles come from the same batch?
Yes, for any one continuous floor or wall. Tiles from different production batches can vary slightly in shade, so a single area should come from one batch to avoid visible banding. We plan every order this way.
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