Tile Calculator
Enter your room and tile size to get the number of tiles, boxes needed, and an estimated grout weight.
How to estimate tile
Divide the room area by the area of one tile to get the tile count, then add a waste allowance for cuts. A straight layout in a simple rectangular room needs about 10% extra; a diagonal layout, herringbone pattern, or a room with lots of corners and fixtures needs 15% or more.
Estimating grout
Grout quantity depends on tile size, joint width, and tile thickness. Smaller tiles and wider joints mean more joint length per square foot, and therefore more grout. The estimate here uses the standard tile-industry weight formula, but coverage varies by grout type, so check the bag's coverage chart before buying.
Tile calculator FAQ
How much extra tile should I buy for waste?
Add 10% for a straight layout in a rectangular room, and 15% or more for diagonal layouts, complex shapes, or herringbone patterns.
How do I calculate how much grout I need?
Grout depends on tile size, joint width, and thickness. This calculator estimates weight using the standard tile-industry formula. Always confirm with the manufacturer's coverage chart.
What size gap should I leave between tiles?
1/8 inch is common for floor tile, 1/16 inch for polished or rectified tile, and 3/16–1/4 inch for rustic or handmade tile.