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Glucose-corrected sodium

Acid-base & electrolytes

Hyperglycaemia pulls water into the plasma and dilutes sodium. Corrects the measured sodium so the true water balance is visible (DKA, HHS).

What you enter

  • Measured sodium (mmol/L)
  • Glucose (mmol/L or mg/dL)
FORMULACorrected Na = Na + 1.6 × (glucose mg/dL − 100) ÷ 100 (Hillier: 2.4 per 100 mg/dL)
SourceHillier TA, Abbott RD, Barrett EJ. Hyponatremia: evaluating the correction factor for hyperglycemia. Am J Med 1999;106:399-403ReviewedFormula and thresholds checked against the source on 2026-08-22. If the source updates, this line will say so.