Division of General Internal Medicine

Online Clinical Calculator

Serum Osmolality

Sodium (Na): mmol/L
(optional) Potassium (K): mmol/L
BUN: mg/dl
Glucose: mg/dl
Serum Osmolality = mOsm/kg
Normal Range = 285 - 295 mOsm/kg
Serum Osmolality = (2 x (Na + K)) + (BUN / 2.8) + (glucose / 18)

General Internal Medicine
9200 W. Wisconsin Ave.
Milwaukee, WI. 53226
Last Update: 12/13/99. Developed by Charles Hu, Ron Kneusel & Gary Barnas M.D.
Comments to: barnas@mcw.edu