Tile Calculator
About the Tile Calculator
Work out how many tiles and boxes you need for a floor or wall from the area and your tile size, including a wastage allowance for cuts and breakage. Avoid the classic renovation mistakes of running short mid-job or over-ordering by a third.
This tool works in your browser: the files and text you use are processed on your device and are not uploaded.
How to use it
- Enter the length and width of the floor or wall area.
- Choose the tile size (e.g. 60 × 60 cm, 30 × 60 cm, 12" × 12").
- Set a wastage percentage and see the tile count and number of boxes to order.
Frequently asked questions
How much extra tile should I buy for wastage?
Add 10% for straight-lay patterns in regular rooms, and 15% for diagonal layouts, herringbone patterns, or rooms with many corners and cut-outs. Keep a few spare tiles after the job for future repairs — matching a discontinued tile later is nearly impossible.
How many tiles come in a box?
It varies by size: 60 × 60 cm tiles typically come 4 per box (1.44 m²), 30 × 60 cm come 8 per box, and 30 × 30 cm come 10–12 per box. Check your supplier’s box coverage and always round up to whole boxes.
Do grout lines change the tile count?
Slightly — a 2–3 mm grout joint on large-format tiles reduces the count by 1–2%, which is well inside the wastage allowance. For small mosaics with wide joints the effect is bigger, but those are sold by sheet coverage anyway.
Should I subtract areas covered by fixtures?
Only subtract large permanent features like a fitted kitchen island or built-in wardrobe. Do not subtract vanities, toilets, or appliances — tiling under or around them uses nearly as much material because of the cuts involved.