Free Water Deficit

Estimates the free water deficit in hypernatremia, to guide the volume of water/hypotonic fluid replacement.

For healthcare professionals.These calculate a score or a measurement from values you enter. They do not diagnose, and they are no substitute for clinical judgement. If you are a patient, discuss any result with your own doctor rather than acting on it.

Weightkg

Sex

Age ≥ 65 years

Current SodiummEq/L

Target SodiummEq/L

Enter the values above to see the result.

Source

Adrogué HJ, Madias NE. Hypernatremia. N Engl J Med. 2000;342(20):1493-1499.

Shown for reference and checked against the source above. Confirm against current guidance before acting on it, and use your own clinical judgement.

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