Calculator
Tile Grout Calculator
Estimates grout requirement per square metre and the total mix weight for your tile layout.
Online calculation
Enter dimensions
Result
Result
Your result will appear here after calculation.
Calculation formula
Estimated grout per m² = ((tile length + tile width) ÷ (tile length × tile width)) × joint width × tile thickness × density. Total grout = grout per m² × tiled area.
Example: For 30 × 30 cm tiles, 8 mm thickness, a 5 mm joint and density of 1,600 kg/m³, the formula gives about 0.43 kg/m².
Frequently asked questions
Why is grout usage only approximate?
Real layouts include joint crossings, uneven edges, application losses and product density differences. Add an allowance and check the product data sheet before buying.
How does joint width affect the result?
A wider joint and a thicker tile create more space to fill, so the estimated grout requirement increases.