Health

Sodium Correction Calculator

Corrected sodium for hyperglycaemia.

Enter your values

Results update instantly as you type — no submit needed.

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

  1. 1Enter measured serum sodium.
  2. 2Enter serum glucose in mg/dL.
  3. 3Compare Katz and Hillier corrections.

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.