FREE QUALITY TOOL

Molarity Calculator

M = moles ÷ litres

Method / formulaM = moles ÷ litres

Keep units consistent. Record assumptions and independently verify critical results.

CALCULATED RESULT—

The result updates as valid values are entered.

Unit handlingCompatible units are normalized internally. Confirm units, assumptions and significant figures before use.

CALCULATION GUIDE

Understand your calculation

Clear inputs, a practical example and the context you need to interpret your result.

How it works

Converts mass to grams and final volume to litres; molarity = mass ÷ molecular weight ÷ volume.

Inputs and units

Select mg, g or kg for mass; enter molecular weight in g/mol and final volume in mL or L. Molecular weight and volume must be positive; zero mass gives zero molarity.

Worked example

5.844 g ÷ 58.44 g/mol ÷ 1 L = 0.100000 mol/L.

Interpreting the result

The result is moles of the stated solute per litre of final solution.

Assumptions and limitations

Use the correct hydrate or salt molecular weight. No purity, moisture, dissociation or temperature correction is applied.