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Molarity Calculator

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Calculate molar concentration (mol/L) from mass, molar mass and volume.

Dr. Lena FischerVerified

PhD Chemistry (Analytical), MRSC

Analytical chemist with 12 years in pharmaceutical QA, spectroscopy, and solution chemistry. Passionate about making chemistry accessible.

Mass of solute (g)

Molar mass of solute (g/mol)

Volume of solution (L)

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About the Molarity Calculator

Molarity (M) is the number of moles of solute dissolved per litre of solution. It is the most common way to express solution concentration in chemistry.

How it works

M = \frac{n}{V} = \frac{m}{M_r \times V}

Tips to improve your result

1.
Always use the volume of the final solution, not the volume of solvent added.

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