Calculate the grout (joint filler) quantity needed in kg based on tile size, joint width, thickness and grout type — with margin.
| Step | Formula |
|---|---|
| Joint length per m² | 1/height(m) + 1/width(m) |
| Joint cross-section | Joint width × tile thickness |
| Volume per m² | Joint length × cross-section |
| Consumption kg/m² | Volume × grout density |
The smaller the tile, the more joints per m² and the higher the grout consumption. Actual consumption may differ from the manufacturer's instructions on the packaging.
10–15% is standard — covers losses during mixing and filling joints. For complex tiles (textured, mosaic) — up to 20%.
Cement grout is cheaper and easier to work with, but less resistant to stains and moisture. Epoxy grout is more resistant, suitable for wet areas and pools, but harder to apply and more expensive.
Yes, grout (joint filler) and adhesive (for fixing tiles) are different materials with different consumption — for adhesive quantity use the tile calculator.
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