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Albumin-Corrected Calcium

Serum calcium corrected for albumin concentration.

Calcium unit

mmol/L
g/dL

About this calculator

In hypoalbuminemia, measured calcium underestimates true ionized calcium. Payne's correction provides a clinically useful estimate without measuring ionized calcium.

Source

Payne RB, Little AJ, Williams RB, Milner JR. Interpretation of serum calcium in patients with abnormal serum proteins. Br Med J. 1973;4(5893):643-646.

Formula version: payne-1973-v1