Thinset Mortar Calculator
Thinset Estimate
Calculate thinset mortar for tile installation
sq ft
%
Formula
Bags = ceil((Area × WasteFactor) / CoveragePerBag); coverage varies by trowel notch size
Frequently Asked Questions
How much thinset do I need per square foot?
It depends on the trowel notch size. With a 1/4-inch notch trowel, one 50-lb bag covers about 95 sq ft. With a 1/2-inch notch trowel for larger tiles, one bag covers about 40 sq ft.
What trowel size should I use?
Use a 1/4-inch notch for tiles up to 8 inches, 3/8-inch for tiles 8-16 inches, 1/2-inch for tiles 16-24 inches, and 3/4-inch for tiles larger than 24 inches.