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Grout consumption depends on the tile size and the joint, not just the floor area — a small tile with a wide joint uses far more than a large tile with a narrow one. This calculator turns your area, tile dimensions and joint size into the exact kilograms — and number of bags — of grout to order.
Calculate the quantity →Enter the floor area, the tile's length and width, the joint width and its depth (the tile thickness). The result already includes a 10% mixing and application loss.
Enter the area, tile size and joint dimensions to see the quantity.
Quantity = area × (L+W)/(L×W) × joint width × joint depth × density, +10% loss.
The joint depth defaults to the tile thickness; a deeper bed of adhesive under the tile does not add to the grout figure, only the visible joint does.
Approximate grout consumption per m² for a few common combinations, at 1.6 kg/l density and 10 mm joint depth:
| Tile size / joint width | Approx. consumption |
|---|---|
| 300×300 mm, 3 mm joint | ≈ 0.35 kg/m² |
| 600×600 mm, 3 mm joint | ≈ 0.18 kg/m² |
| 200×200 mm, 5 mm joint | ≈ 0.88 kg/m² |
Work out the kilograms and bags of grout for the visible joints, from your area, tile dimensions, joint width and depth.
Plan the tile layout or work out the adhesive underneath. Autolay's planner and robot handle the tile count, the layout and the waste from your floor plan — not the grout in the joints, and not the adhesive below them.
Before you grout, the free Autolay planner works out the tile count, cut pieces and waste from a photo of your floor plan, a BIM/IFC file or a 3D scan.
Open the free planner →