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Molality from Moles of Solute and Mass of Solvent Calculator

Concentration in mol/kg solvent.

Calculates molality m = n_solute / mass_solvent (kg). Used in colligative property calculations where mass-based concentration is needed.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

mol
g

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

m = n / m_solvent(kg)

In depth

Calculates molality m = n_solute / mass_solvent (kg). Used in colligative property calculations where mass-based concentration is needed.