Free Water Deficit in Hypernatremia

Free Water Deficit in Hypernatremia

This calculator estimates the free water deficit in patients with hypernatremia, based on current and target sodium levels and body weight.

Weight (kg): Current Sodium (Na+ in mEq/L): Target Sodium (Na+ in mEq/L):

Formula: Water Deficit = TBW x [(Na_current / Na_desired) - 1]

Enter patient weight and current serum sodium. The target is usually 140 mEq/L.

Sources: UpToDate, MedCalc, NEJM clinical references.

Coded by Jagjot Singh