Serum Osmolality Gap

Detects unmeasured osmoles (toxic alcohols, propylene glycol).

Enter the values below to see the result.

Inputs

Sodium (mEq/L)

Glucose (mg/dL)

BUN (mg/dL)

Measured Osmolality (mOsm/kg)

One platform for the whole case

Vigil pairs calculators like this with cited answers, weight- and organ-adjusted dosing, board prep, and a perioperative record — all in one place.

Decision support for licensed clinicians — verify every result against the patient and primary sources. Not a substitute for clinical judgment.