When installing tiles, it's essential to calculate the precise amount of grout required to avoid running out or waasting material. A Laticrete Grout Calculator simplifies this process by taking specific tile and area measurements and determining the required grout quantity.

What is Grout?

Grout is a cement-like substance used to fill the gaps (joints) between tiles, providing both structural stability and aesthetic appeal. The quantity of grout required depends on the tile dimensions, the grout joint width, and the total tiling area.

Inputs Needed for Grout Calculation

1. Tile Width (W): The width of an individual tile.
2. Tile Height (H): The height of an individual tile.
3. Tile Thickness (T): The thickness of the tile.
4. Grout Joint Width (J): The width of the gap between the tiles.
5. Total Tiling Area (A): The total area to be covered with tiles.

Formulas for Grout Calculation

1. Grout Volume Per Tile

To calculate the volume of grout required per tile, use the formula:

$V_{\text{tile}} = 2 \times (W + H) \times J \times T$

Where:

• $V_{\text{tile}}$ = Volume of grout required per tile.
• W = Tile width.
• H = Tile height.
• J = Grout joint width.
• T = Tile thickness.

2. Total Grout Volume

Once you know the grout volume per tile, calculate the total grout volume based on the number of tiles. The number of tiles is determined by dividing the total tiling area by the area of one tile.

$V_{\text{total}} = \frac{A}{W \times H} \times V_{\text{tile}}$

Where:

• $V_{\text{total}}$ = Total grout volume required.
• A = Total tiling area.
• $W \times H$ = Area of one tile.

3. Grout Weight

To convert the total grout volume into weight, multiply the total volume by the grout’s density (ρ):

$W_{\text{grout}} = V_{\text{total}} \times \rho$

Where:

• $W_{\text{grout}}$ = Total grout weight required.
• ρ = Density of the grout (typically provided by the manufacturer, in kg/m³ or lbs/ft³).

Example Calculation

Inputs:

• Tile Width (W) = 300 mm (0.3 m)
• Tile Height (H) = 300 mm (0.3 m)
• Tile Thickness (T) = 10 mm (0.01 m)
• Grout Joint Width (J) = 5 mm (0.005 m)
• Total Area (A) = 20 m²
• Grout Density (ρ) = 1600 kg/m³

Step 1: Calculate Grout Volume Per Tile

$V_{\text{tile}} = 2 \times (0.3 + 0.3) \times 0.005 \times 0.01 = 0.00006 \, \text{m}^3$

Step 2: Calculate Total Grout Volume

$V_{\text{total}} = \frac{20}{0.3 \times 0.3} \times 0.00006 = 0.01333 \, \text{m}^3$

Step 3: Calculate Grout Weight

$W_{\text{grout}} = 0.01333 \times 1600 = 21.33 \, \text{kg}$

Final Output

• Grout Volume: 0.01333 m³
• Grout Weight: 21.33 kg
• Grout Bags: Based on bag size, calculate the number of bags required (e.g., for a 5 kg bag, ⌈21.33/5⌉= 5 bags