ClarityHow to use this tool
- Enter tiled area, tile length, tile width, joint width, filled joint depth, grout density, waste allowance.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
The method, explained
Joint area fraction = 1−LW/[(L+j)(W+j)]. Grout litres = tiled area × joint fraction × depth in mm; multiply by density and waste allowance.
Using tiled area = 20 m², tile length = 300 mm, tile width = 300 mm, joint width = 3 mm, filled joint depth = 8 mm, grout density = 1.6 kg/L, waste allowance = 10 %, the result is 5.54863249 kg. Change these example inputs to match your task; use the method above to check each step.
Understanding your result
Uniform rectangular grid and filled rectangular joints. Tile bevels, edge joints, voids and supplier yield can change consumption.
What to keep in mind
Uniform rectangular grid and filled rectangular joints. Tile bevels, edge joints, voids and supplier yield can change consumption. A material-quantity estimate, not a structural design or building-code check. Confirm site measurements, supplier coverage and waste before ordering.
Common questions
How do I use this tile grout calculator?
Estimate grout mass for rectangular tiles from joint dimensions and material density. Enter tiled area in m², tile length in mm, tile width in mm, joint width in mm, filled joint depth in mm, grout density in kg/L, waste allowance in %. The starting example is editable; use values for the same system or project.
Which assumptions affect this result?
Uniform rectangular grid and filled rectangular joints. Tile bevels, edge joints, voids and supplier yield can change consumption.
Methodology maintained by ClarityKit. How these tools are built and checked.