Corrected Sodium Calculator
Sodium corrected for high glucose with the Katz and Hillier formulas.
Enter your values to see the result.
Katz (1973) adds 1.6 mmol/L and Hillier (1999) 2.4 mmol/L of sodium for every 100 mg/dL of glucose above 100 mg/dL. For education and clinical decision support only. Results do not replace professional judgment, local protocols or the product information, so always verify doses and values before acting on them.
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How to use the Corrected Sodium Calculator
Sodium corrected for high glucose with the Katz and Hillier formulas.
- 1 Enter the measured sodium.
- 2 Enter glucose in mg/dL or mmol/L.
- 3 Read the corrected sodium from both formulas.
Example and practical tips
Sodium 130 mmol/L with glucose 600 mg/dL corrects to 142 mmol/L (Hillier), so the low reading is due to hyperglycemia.
Further reading
Frequently asked questions
Which correction factor is better?
Hillier’s 2.4 mmol/L per 100 mg/dL fits experimental data better above about 400 mg/dL; Katz’s 1.6 is the classic value.
Why does glucose lower sodium?
High glucose draws water out of cells, diluting the sodium in the blood. As glucose falls, sodium rises again.
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