Sodium Correction Calculator
Corrected sodium for hyperglycaemia.
Enter your values
Enter the measured sodium in mEq/L.
Enter the glucose in mg/dL.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- 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
At a glance
| What it does | Corrected sodium for hyperglycaemia. |
|---|---|
| Category | Health |
| Inputs needed | Measured sodium, Glucose |
| Main output | Corrected sodium (Katz) |
| Formula | Corrected Na = Na + 1.6 × (Glucose − 100)/100 |
| Cost | Free — no sign-up, no download |
How to use the Sodium Correction Calculator
- 1Enter measured serum sodium.
- 2Enter serum glucose in mg/dL.
- 3Compare Katz and Hillier corrections.
Inputs explained
- Measured sodium(mEq/L)
- Enter the measured sodium in mEq/L.
- Glucose(mg/dL)
- Enter the glucose in mg/dL.
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.
What do I need to enter into the Sodium Correction Calculator?
Just 2 values: measured sodium, glucose. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Sodium Correction Calculator work out the answer?
High glucose dilutes serum sodium; corrected sodium adds 1.6–2.4 mEq/L per 100 mg/dL of glucose above 100. It applies the formula Corrected Na = Na + 1.6 × (Glucose − 100)/100 and shows the working so you can check each step by hand.
Is the Sodium Correction Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.