Calculated Serum Osmolality Calculator Sponsored Advertising placement Calculated Serum Osmolality Clinical Decision Tool Calculates estimated serum osmolality from sodium, glucose and blood urea nitrogen. Serum sodium (mmol/L) Glucose (mg/dL) Blood urea nitrogen (mg/dL) Calculate Calculated Serum Osmolality Clear Calculator ☆ Log in to save Save this calculator to your MDPDA account. + Add to Toolkit Log in to save incomplete calculator progress and return later. Log in to save progress Clinical Decision Support Only MediCalc calculators are intended to support qualified healthcare professionals and must not replace professional clinical judgement. Do not enter patient-identifiable information into Saved Progress. Read our Clinical Disclaimer Sponsored Advertising placement