Serum Osmolality
Serum osmolality measures the concentration of all dissolved solute particles in blood, acting as the definitive gauge of hydration status.
Test your personal value
Enter the number from your lab report to instantly see how it compares to reference ranges.
Physiological Reference Ranges
The ranges below represent standard adult physiological values. Your laboratory's printed reference range always takes precedence.
275 – 295 mOsm/kg
275 – 295 mOsm/kg
275 – 295 mOsm/kg
What does a low result mean?
A slightly lower reading reflects generous, plentiful plain water drinking throughout the day.
What does a high result mean?
A slightly high number is the classic, reversible sign of mild temporary dehydration, easily restored by drinking fluids.
Questions ready for your doctor
Bring these questions to your next consultation to discuss with your healthcare practitioner:
- Does this result confirm my hydration status on the test morning?
- How does this track with my sodium and blood glucose readings?
- What daily water drinking routine best supports my health?
Do you have a full blood test report?
Upload your lab document (PDF or image) to get an instant, clear explanation for every biomarker at once.
Important information — Medical notice
ScanMyLab is for informational purposes only. It does not provide a diagnosis and never replaces the advice of your doctor or laboratory.