Clinical Resources

Corrected Calcium Calculator

Albumin-Adjusted and Ionized Calcium Estimation

Total Serum Calcium (mg/dL)

mg/dL

Albumin (g/dL)

g/dL

Have direct ionized calcium measurement

Ionized Calcium (mmol/L)

mmol/L

Normal: 1.12-1.32 mmol/L

pH — optional, for pH correction note

Results

Corrected Calcium —

Corrected Ca (mmol/L) —

Estimated Ionized Ca —

Classification —

ECG Note —

Enter total calcium and albumin.

Reference

Payne RB et al. Interpretation of serum total calcium: effects of adjustment for albumin concentration on frequency of abnormal values and on detection of change in the individual. J Clin Pathol. 1979;32(1):56-60.