How to Calculate Molarity

Molarity (M) is moles of solute per liter of solution — the most common concentration unit in general chemistry labs.

Step-by-step

1. Calculate moles of solute from mass and molar mass.
2. Measure total solution volume in liters (not just solvent).
3. Divide: M = moles ÷ volume (L).
4. For dilutions: C₁V₁ = C₂V₂ (moles conserved).
5. Label with solute name: '0.5 M NaCl' not just '0.5 M'.
6. Use our Molarity Calculator for direct and dilution problems.

Open the Molarity Calculator to apply these steps with your own numbers instantly.

Frequently asked questions