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Mass Percent Calculator
Find the mass percent of a solute in a solution.
Concentration by mass
Mass percent expresses concentration as the fraction of a solution’s mass that is the dissolved substance. It is the everyday way to label things like a 5% salt solution.
Dissolving 10 grams of salt in 190 grams of water makes 200 grams of solution that is 5% salt by mass. Enter your solute and total solution mass for the percentage.
Simple and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is mass percent?
The mass of the solute divided by the total mass of the solution, times one hundred.
What counts as solution mass?
The solute plus the solvent — the whole mixture.
What units?
Any, as long as solute and solution masses use the same unit.
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