Hyponatremia Correction Calculator
Hyponatremia Correction Calculator
When to Use
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Pearls/Pitfalls
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Why Use
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Show formula
Na⁺ Requirement (mmol) = Total Body Water × (Target Na⁺ − Current Na⁺)
Infusion Rate (cc/hr) = [Na⁺ Requirement × 1000] ÷ [Infusate Na⁺ × Time (hrs)]
Total Body Water (TBW): Children/Men 0.6 × weight; Women 0.5 × weight.
Flagged if the projected 24h change exceeds 10 mEq/L/24h (osmotic demyelination syndrome risk).
For reference only — verify against the source CPG and confirm with a senior before clinical use. Source: Adrogue HJ, Madias NE. Hyponatremia. N Engl J Med. 2000;342(21):1581–1589.. Last reviewed: 2026-07-17.