What is the Molarity Calculator?
Calculate the molarity of a solution from mass, molar mass and volume. These physics and science calculators apply standard SI formulas with exact constants (such as g = 9.80665 m/s² and the 2019 SI definitions) for students, engineers and curious minds.
How to use the Molarity Calculator
- Enter your mass of solute, your molar mass, your solution volume.
- Results update automatically as you type; you can also press Calculate.
- Read the output: molarity, moles of solute.
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Worked example
With mass of solute = 5.85 g, molar mass = 58.44 g/mol, solution volume = 0.5 L, the Molarity Calculator returns molarity: 0.2002 mol/L; moles of solute: 0.10010 mol.
Tips for better results
- Convert inputs into SI units first for the cleanest results.
- Idealized formulas ignore friction and air resistance unless stated.
- Use our unit converters to switch between metric and imperial results.
Frequently asked questions
What does the Molarity Calculator do?
Calculate the molarity of a solution from mass, molar mass and volume.
How is it calculated?
The Molarity Calculator uses this method: M = (mass ÷ molar mass) ÷ volume.
Can you show an example?
With mass of solute = 5.85 g, molar mass = 58.44 g/mol, solution volume = 0.5 L, the Molarity Calculator returns molarity: 0.2002 mol/L; moles of solute: 0.10010 mol.
Is the Molarity Calculator accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Molarity Calculator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
Related tools
📬 Get new tools first — free
Join Taurang to hear about new calculators, converters and features. No spam; unsubscribe anytime.