Sodium Correction Calculator

How this calculator works

Corrected sodium estimates the expected serum sodium after accounting for hyperglycemia-related osmotic water shifts.

Inputs used

• Measured sodium
• Glucose

Clinical interpretation

Use corrected sodium to interpret tonicity and guide fluid selection in hyperglycemic emergencies and severe dysglycemia.

Limitations and safety notes

Correction formulas are estimates. Recheck sodium frequently during treatment and consider measured osmolality, renal function, and volume status.

References

• Katz MA. Hyperglycemia-induced hyponatremia: calculation of expected serum sodium depression. N Engl J Med. 1973.
• Hillier TA, Abbott RD, Barrett EJ. Hyponatremia: evaluating the correction factor for hyperglycemia. Am J Med. 1999.

Editorial review and citation methodology

Reviewed by the Quick Medical Calculator Editorial Team. Last reviewed: June 19, 2026. The review checks calculator inputs, intended population, interpretation, limitations, and source alignment.

• Prefer original validation studies for scoring systems and prediction tools.
• Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
• Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.