Sodium Correction Calculator
Corrected sodium for hyperglycaemia.
Enter your values
ⓘ Live results
Results
- Corrected sodium (Katz)
- 136.3 mEq/L
- Corrected sodium (Hillier)
- 140.5 mEq/L
- Measured sodium
- 128 mEq/L
- Correction (Katz)
- 8.3 mEq/L
- Status after correction
- Normal range
Quick answer
High glucose dilutes serum sodium; corrected sodium adds 1.6–2.4 mEq/L per 100 mg/dL of glucose above 100.
Corrected Na = Na + 1.6 × (Glucose − 100)/100
How to use the Sodium Correction Calculator
- 1Enter measured serum sodium.
- 2Enter serum glucose in mg/dL.
- 3Compare Katz and Hillier corrections.
Worked example
Using the values the calculator loads with:
Inputs
- Measured sodium128 mEq/L
- Glucose620 mg/dL
Results
- Corrected sodium (Katz)136.3 mEq/L
- Corrected sodium (Hillier)140.5 mEq/L
- Measured sodium128 mEq/L
- Correction (Katz)8.3 mEq/L
- Status after correctionNormal range
Frequently asked questions
Which factor should I use?
Katz 1.6 is traditional; Hillier 2.4 fits better at glucose above 400 mg/dL.
Why does glucose lower sodium?
It draws water into the vascular space, diluting sodium.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.