Molarity Calculator

Find solution concentration in moles per litre.

Molarity (mol/L (M)) 0.25

Formula: molarity = moles ÷ volume (L)

Step-by-step with your numbers:

1. Values used:

2. Amount of solute = 0.5 mol

3. Solution volume = 2

5. Molarity = Amount of solute / Solution volume = 0.5 / 2 = 0.25mol/L (M)

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Molarity (M) is the most common way to express concentration: moles of solute per litre of solution.

The math behind it

molarity = moles of solute ÷ litres of solution.

0.5 mol in 2 L → 0.25 mol/L (0.25 M).

Molarity vs molality?

Molarity is per litre of solution; molality is per kilogram of solvent (temperature-independent).