Tile Grout Calculator
Kilograms of grout for a tiled area, from tile size, joint width and tile thickness.
Results
Mass
4.00
kg
Mass
0.1600
kg/m²
Cement bags
1
What this tool does
Small tiles need far more grout than large ones for the same area, because the total length of joint per square metre goes up as the tiles get smaller — mosaic can use several times what a large format tile needs. Grout density varies by product, so check the bag.
Formula
kg/m² = (A + B) ÷ (A × B) × width × depth × density
Variables
| Symbol | Meaning | Unit |
|---|---|---|
a | Tile length | mm |
b | Tile width | mm |
jw | Joint width | mm |
t | Tile thickness | mm |
ar | Area | m² |
d | Density | kg/dm³ |
KG | Mass | kg |
KM | Mass | kg/m² |
B5 | Cement bags | — |
Worked example
- Tile length600 mm
- Tile width600 mm
- Joint width3 mm
- Tile thickness10 mm
- Area25 m²
- Density1.6 kg/dm³
- Mass4.00 kg
- Mass0.1600 kg/m²
- Cement bags1
Limitations
- The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
- Coverage and consumption figures vary between products. Take the values from the manufacturer's datasheet for the product you are actually using.