About the Concentration Converter
A free tool for converting between the four most common concentration units.
What it is
This calculator converts between molarity, molality, mass percent, and ppm using the solute's molar mass and the solution's density. Enter a value in any one unit and see the equivalent in the other three simultaneously.
Features
Four concentration units
Molarity, molality, mass percent, and ppm.
Convert from any unit
Enter any one value and get the other three.
Uses density and molar mass
The proper physical link between mass- and volume-based units.
Instant, private
Runs entirely in your browser. No data is sent anywhere.