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RenalNephrology

Free Water Deficit — Hypernatraemia Management

Calculates the free water deficit in hypernatraemia to guide fluid replacement and safe correction rate.

Body weight
kg
Age
years
Sex
Serum sodium
mmol/L

Reference: Adrogue HJ, Madias NE. NEJM 2000

Medical Disclaimer: This calculator is a clinical decision support tool for qualified healthcare professionals. It does not replace clinical judgement. Always interpret results in the full clinical context. Reference: Adrogue HJ, Madias NE. NEJM 2000.