How this estimate works
The calculator applies: jointLength x jointWidth x depth x density x (1 + waste/100). Keep measurements in one unit system and round up when suppliers sell whole units.
Limitations
Tile thickness, joint profile, aggregate, and mixing losses affect coverage.
Source to check
Read the authoritative guidance for grout calculator
Frequently asked question
Can grout fill movement joints? No. Use a suitable flexible sealant where movement is expected.