How many tiles do you need per m²?
The number of tiles per m² depends primarily on the tile size. As a rule of thumb:
These figures exclude grout joints and waste. With joints and waste you should typically add 5–10%.
How to calculate it
The formula is straightforward: divide 1 m² (10,000 cm²) by the tile area in cm². Remember to account for the grout width, which is typically 2–5 mm.
Common tile sizes and tiles per m²
The table below shows the most popular tile sizes and the approximate number of tiles per m² — excluding grout joints.
Don't forget waste and cutting
Regardless of tile size, you should always add extra for waste. Tiles can break, need cutting along edges, around pipes and corners — and sometimes the pattern doesn't align perfectly.
- •5% — simple rectangular room, large tiles, straight layout
- •10% — most rooms, many corners and cuts
- •15% — diagonal layout, many niches, irregular rooms
It's always cheaper to buy a few extra than to come up short and risk the colour batch being discontinued.
Calculate your tile needs automatically
Use MyPlanDIY's free tile calculator — enter the room dimensions and tile size, and get the exact quantity including waste and packs.
Use the results in a real project
With MyPlanDIY you can save materials, create a budget, keep track of tasks and organise everything in one project — completely free.
No credit card required. Free demo project included.