Corrected Sodium Hyperglycemia
Calculator

Elevated glucose in the blood pulls water out of cells into the bloodstream through osmosis, which dilutes the sodium concentration and makes measured sodium appear lower than the body's true sodium balance. This correction estimates what sodium would read once blood sugar returns to normal.

A commonly used formula adds about 1.6 mEq/L to the measured sodium for every 100 mg/dL that glucose exceeds a normal level (typically 100 mg/dL), though some guidelines use a factor of 2.4 for very high glucose levels. This calculator applies one of these standard correction factors to the values you enter.

It matters most in patients with significantly elevated glucose, such as those with diabetic ketoacidosis or hyperosmolar hyperglycemic state, where uncorrected sodium readings could be misread as true hyponatremia and lead to inappropriate treatment. Correcting for glucose gives a clearer picture of actual sodium and water balance.

Yes, if the corrected sodium is actually normal or only mildly low, aggressive sodium replacement isn't warranted, whereas true hyponatremia unrelated to glucose may need direct treatment. This is why identifying whether low sodium is a dilutional effect of hyperglycemia matters clinically.

No, sodium and glucose abnormalities are best interpreted together with a patient's overall clinical picture, hydration status, and other lab values by a qualified healthcare provider. This tool provides an educational estimate only.