Molality Converter – 5 Units | Unit Converter Tool

Unit	Value
Moles per kilogram mol/kg	1
Millimoles per kilogram mmol/kg	1,000
Micromoles per kilogram µmol/kg	1,000,000
Moles per gram mol/g	0.001
Millimoles per gram mmol/g	1

Unit

Value

Moles per kilogram mol/kg

Millimoles per kilogram mmol/kg

1,000

Micromoles per kilogram µmol/kg

1,000,000

Moles per gram mol/g

0.001

Millimoles per gram mmol/g

Popular molality conversions

About molality units

Molality is moles of solute per kilogram of solvent (not of solution). Unlike molarity it does not change with temperature, which is why it is used for colligative properties such as freezing-point depression.

Molality unit reference

All molality units, expressed in moles per kilogram
Unit	Symbol	Value in mol/kg	System
Mole per kilogram	mol/kg	1 mol/kg	SI
Millimole per kilogram	mmol/kg	0.001 mol/kg	SI
Micromole per kilogram	µmol/kg	0.000001 mol/kg	SI
Mole per gram	mol/g	1,000 mol/kg	SI
Millimole per gram	mmol/g	1 mol/kg	SI

Frequently asked questions

What is the SI unit of molality?

This converter uses the mole per kilogram (mol/kg) as its reference unit; every other unit is defined relative to it.

How many molality units can I convert?

5 units are supported here, across SI systems. Every pair can be converted in both directions.

Does this molality converter work offline?

Yes. Once the page has loaded, every calculation runs locally in your browser — nothing is sent to a server.