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Grout Calculator — Free Online Calculator

Calculates the amount of tile grout needed for joints.

What is it?

The grout calculator works out how many bags you need to fill the joints between tiles, based on the area and the tile dimensions.

Formula

Kg = area × (tile width + tile height) × joint width × 1700 / (tile width × tile height) Bags = ⌈kg / bag weight⌉

Example

Room 4 × 3 m = 12 m², tile 30 × 30 cm, joint 3 mm. Kg: 12 × 0.6 × 0.003 × 1700 / 0.09 = 408 kg → ⌈408 / 5⌉ = 82 bags.

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