Thinset Calculator
Use this thinset calculator to find how much thinset you need for any tiling project.
Volume needed3.086 US gallons11.68 litres, including 10% waste
Quarts12.34
Litres11.681
Cubic feet0.4125
Area covered24 sq ft
Thickness0.1875 in4.76 mm
Coverage at this thickness7.78 sq ft per gallon
The method
volume = area × depth, or area ÷ stated coverage
Coverage is thickness in disguise
A gallon is 231 cubic inches, so spread ⅛ inch thick it covers 1,848 square inches — about 12.8 square feet. Halve the thickness and you double the coverage; the two numbers are the same fact stated differently.
Self-levelling products need the thickness right, because too thin will not level and too thick can cure hot and crack. Check the manufacturer’s range before trusting an arithmetic answer.