Molarity Mass Calculator
Molarity mass calculator works out Molarity and Moles of solute from Molar mass of the solute, Final solution volume and Target molarity. The default figures on this page give molarity of 1.000000 mol/L; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
2 steps
- n = C x V = 1 mol/L x 1 L = 1 mol
- M = n / V = 1 mol / 1 L = 1 mol/L
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
What the molarity mass calculator calculates
Relates molarity, moles of solute, solute mass, molar mass and solution volume, solving for whichever of them the supplied values determine.
How to use this molarity mass calculator
Enter Molar mass of the solute, Final solution volume and Target molarity. Molarity updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Molarity, Moles of solute and Solute mass.
The method follows OpenStax Chemistry 2e, section 3.3 Molarity, OpenStax Chemistry 2e, section 3.1 Formula Mass and the Mole Concept and IUPAC Compendium of Chemical Terminology (Gold Book), "amount concentration" and "mass concentration".
What you can compare
Change one input at a time to see how it affects Molarity, Moles of solute and Solute mass. The inputs you can vary are Molar mass of the solute, Final solution volume and Target molarity.
Understanding Molarity, Moles of solute and Solute mass
Solution preparation figures assume the final volume is made up to the stated value. Confirm reagent purity, hydration state and the molar mass you entered before weighing anything out.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How to calculate mass with molarity?
Relates molarity, moles of solute, solute mass, molar mass and solution volume, solving for whichever of them the supplied values determine. Open “How this is worked out” beside the result to see each step for your own figures.
How do I convert mass to molarity?
It needs Molar mass of the solute, Final solution volume and Target molarity. Nothing else is required, and the figures stay in your browser.
What is 1 molarity equal to?
Relates molarity, moles of solute, solute mass, molar mass and solution volume, solving for whichever of them the supplied values determine. On this page it is computed from Molar mass of the solute, Final solution volume and Target molarity and shown as Molarity, Moles of solute and Solute mass.
How do I convert molarity to grams?
The result gives Molarity, Moles of solute, Solute mass, Mass concentration, Solution volume and Millimolar equivalent, each labelled with its unit so the figure can be read on its own.
What information do I need for the molarity mass calculator?
You need Molar mass of the solute, Final solution volume and Target molarity. The page opens with default figures that give molarity of 1.000000 mol/L, so you can see the scale before entering your own.
What does this molarity mass calculator show?
It shows Molarity, Moles of solute, Solute mass, Mass concentration, Solution volume and Millimolar equivalent, with the working and any warnings for your entries.