Calculator

Enter total calcium and serum albumin. Choose either conventional units (mg/dL, g/dL) or SI units (mmol/L, g/L). Selecting one unit system automatically applies to both calcium and albumin (same as the original calculator).

Enter a number, then set units below.
Enter a number, then set units below.
Calcium units
Changing units here also changes albumin units to match.
Albumin units
Kept in sync with calcium units (original behavior).
Tip: Albumin correction is an estimate; interpret clinically.
Formulas

Conventional: Corrected calcium = serum calcium + 0.8 × (4 − serum albumin) Calcium in mg/dL; albumin in g/dL.

SI: Corrected calcium = calcium + 0.02 × (40 − albumin) Calcium in mmol/L; albumin in g/L.