Question 1

How do I calculate how much grout I need for tile?

Accepted Answer

Grout quantity depends on tile Length, Width, Thickness, and Joint Width. The formula determines cubic volume of joints per square foot. For standard 12x24 tiles with 1/8 inch joint, you need approximately 0.05 lbs of grout per square foot.

Question 2

Should I buy unsanded or sanded grout?

Accepted Answer

Use unsanded grout for joint widths under 1/8 inch (especially delicate glass or polished marble). Use sanded grout for joint widths 1/8 inch and wider to prevent shrinkage cracking.

Tile Grout Quantity Estimator