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Educational use only. Not a substitute for clinical judgment. Always verify independently.
Free Water Deficit
Calculate free water deficit and safe correction rate for hypernatremia.
mEq/L
mEq/L
kg
Age
TBW
42L
Free water deficit
4.5L
D5W rate
125mL/hr
Correction limits
- Max 0.5 mEq/L/hr
- Max 10 mEq/L in first 24 hours
- Estimated correction time: 30 hours
Hypernatremia: free water deficit of 4.5 L. Correct no faster than 0.5 mEq/L/hr and no more than 10 mEq/L in the first 24 hours. Use D5W or enterally administered free water. Account for ongoing losses.
References
Updated 2026-04-20Report an error