How this estimate works
The calculator applies: ceil(length x width x (1 + waste/100) / coverage). Keep measurements in one unit system and round up when suppliers sell whole units.
Limitations
Diagonal layouts, patterns, spare tiles, and minimum order sizes may require more.
Source to check
Read the authoritative guidance for tile calculator
Frequently asked question
Why round up? Tiles are sold in whole boxes, and cuts cannot usually be returned to stock.