Nephrology · Emergency Medicine · ICU and Critical Care · Internal Medicine
Serum Osmolality (Calculated) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
mmol/L
Allowed range: 100–180 mmol/L
Quick picks
mg/dL
Allowed range: 20–2000 mg/dL
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mg/dL
Allowed range: 1–200 mg/dL
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Result
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Clinical inputs
- Serum sodium (mEq/L)Accepted range: 100 to 180
- Glucose (mg/dL)Accepted range: 20 to 2000
- BUN (mg/dL)Accepted range: 1 to 200
Primary source
Dorwart WV, Chalmers L. Comparison of methods for calculating serum osmolality from chemical concentrations, and the prognostic value of such calculations. Clin Chem. PMID: 1112025. Scope: calculated osmolarity ≈ 2×Na + glucose/18 + BUN/2.8 (conventional units). (1975)
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