Molarity Calculator
Calculate the molarity (molar concentration) of a solution from solute mass, molar mass, and solution volume. Essential for chemistry lab work and solution preparation.
Inputs
Results
Molarity
1 M
Moles of Solute
1 mol
How to Use This Calculator
- Enter solute mass (g) and molar mass (g/mol) to calculate moles of solute.
- Enter solution volume (L).
- Review molarity in mol/L (M) and moles of solute.
- To make a solution of known molarity: use the mass needed output to weigh the solute before adding solvent to volume.
- Check units carefully -- molarity is moles per liter, not per kg (which would be molality).
How the result changes with Molar Mass
| Molar Mass | Molarity | Moles of Solute |
|---|---|---|
| 1,000 | 0.0584 M | 0.0584 mol |
| 3,500 | 0.0167 M | 0.0167 mol |
| 6,500 | 0.009 M | 0.009 mol |
| 9,000 | 0.0065 M | 0.0065 mol |
What each input means
- Solute Mass
- Mass of the dissolved substance in grams (e.g., 58.44g of NaCl).
- Molar Mass
- Molar mass of the solute (e.g., NaCl = 58.44 g/mol, glucose = 180.16 g/mol).
- Solution Volume
- Total volume of the solution in liters.
What each result means
- Molarity
- Molar concentration (moles of solute per liter of solution).
- Molality
- Moles of solute per kilogram of solvent.
How this is calculated
Formula
Molarity (M) = moles / volume = (mass / molar mass) / volume. Where: moles = mass (g) / molar mass (g/mol), and volume is in liters.Worked example, using the default values
- Identify Input ParametersSolute Mass = 58.44, Molar Mass = 58.44, Solution Volume = 1 = 3 input(s) provided
- Calculate MolarityMolarity1 = 1
- Calculate Moles of SoluteMoles of Solute1 = 1
- Calculate MillimolesMillimoles1000 = 1000
- Calculate ConcentrationConcentration58.44 = 58.44
Engine last updated . Checked against 1 independently-derived test — how we verify calculators.
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