How the tile calculator works
Each area is length × width (or width × height for a wall), added together. The number of tiles is that total divided by the size of one tile, plus extra for cuts and breakage, rounded up to a whole tile. Boxes are the area you need to order divided by the coverage printed on the box, rounded up.
The installation estimate multiplies each area by our published labour rates for that surface: floors, walls, showers with Schluter KERDI waterproofing, large-format tile, natural stone, herringbone layouts and the extras you tick.
How much extra tile should I buy?
- 10% for a straight or brick layout in a simple, rectangular room.
- 15% for diagonal, herringbone and chevron layouts, or rooms with many corners, a tub or a vanity to cut around.
- 15–20% for large-format tile and natural stone. One broken 24×48 tile is a lot of area, and stone often has pieces you'll want to leave out for colour or veining.
Buy all of it at once. Tile is made in batches that can differ slightly in shade and size, so a box bought later may not match. Check that the batch numbers on your boxes match, and keep a few spare tiles for future repairs.
Common tile sizes in inches and centimetres
- 7.5 × 30 cm is sold as 3 × 12 in (subway)
- 30 × 60 cm is sold as 12 × 24 in
- 60 × 60 cm is sold as 24 × 24 in
- 60 × 120 cm is sold as 24 × 48 in (large-format)
- 120 × 120 cm is sold as 48 × 48 in (large-format)
These are nominal sizes. For an exact count, use the size on the box: choose “Other size” in the calculator and switch to cm if you need to.
How to measure for tile
- Floors: measure the length and width of the room at the longest points. Split L-shaped rooms into two rectangles and add each as its own area.
- Walls: measure each wall's width and the height you're tiling to. Don't subtract small openings: the extra tile covers them. Subtract large windows or doors as their own calculation if you want to be precise.
- Showers: add each wall as a “Shower” area (width × height), plus the shower floor.
- Backsplashes: measure the length of the counter run and the height from the counter to the cabinets.
Not sure about your measurements? Send us photos with a rough size on WhatsApp and we'll tell you what we'd order.
