MedConvert
Urine & CSF

Urine osmolality unit converter

Concentration of dissolved particles in urine

Also known as: Urine osmolarity, Uosm, Osmolalité urinaire, Osmolalidad urinaria, Osmolalità urinaria, Osmolalidade urinária

Converter

Enter a value in any unit and all other units fill in.

Reference range

UnitAdults
mOsm/kg = mmol/kg50 – 1200

Source: MedlinePlus (NLM): Osmolality urine test · Last reviewed: 2026-10-14

Note from the source: Random specimen 50-1200 mOsm/kg; above 850 after 12-14 h of fluid restriction (MedlinePlus)

Frequently asked questions

What is the reference range of Urine osmolality?

For adults the range is 50 – 1200 mOsm/kg (MedlinePlus (NLM): Osmolality urine test). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Urine osmolality?

Common units are mOsm/kg.

Related tests