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Serum Osmolality
Blood
Serum Osmolality
Also known as: Serum Osm, SOsm
COMMON RANGE
275 – 295
mOsm/kg
273
303
M
Mayo Clinic Laboratories
Adult
↗
See all sources ↓
Reference ranges across 10+ sources
Adult reference ranges from 4 entries across 4 trusted sources, shown in mOsm/kg. Compare side-by-side.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
A
ARUP Laboratories
All
≥18
275 – 295 mOsm/kg
↗
M
Mayo Clinic Laboratories
All
≥18
275 – 295 mOsm/kg
↗
Q
Quest Diagnostics
All
≥18
275 – 295 mOsm/kg
↗
L
Labcorp
All
≥18
280 – 300 mOsm/kg
↗
A
ARUP Laboratories
All · ≥18
↗
275 – 295 mOsm/kg
M
Mayo Clinic Laboratories
All · ≥18
↗
275 – 295 mOsm/kg
Q
Quest Diagnostics
All · ≥18
↗
275 – 295 mOsm/kg
L
Labcorp
All · ≥18
↗
280 – 300 mOsm/kg
Related biomarkers
Often tested alongside serum osmolality or part of the same panel.
White Blood Cells (WBC)
Blood
Red Blood Cells (RBC)
Blood
Hemoglobin (Hgb)
Blood
Hematocrit (Hct)
Blood
Platelets (PLT)
Blood
Mean Corpuscular Volume (MCV)
Blood
Sources
A
ARUP Laboratories
M
Mayo Clinic Laboratories
Q
Quest Diagnostics
L
Labcorp
Last updated 2026-05-02
This page aggregates publicly available reference data and clinical information from Mayo Clinic Laboratories and other sources. For general wellness information only — not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.
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