Medical calculators

Corrected Ca

For Albumin

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Anatium is a study resource, not medical advice. Nothing here is a diagnosis, a prescription or a substitute for a clinician who has seen the patient. Check every number against a current local protocol before it touches anyone, and never act on a result you cannot reproduce yourself.

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How it is calculated

Corrected Ca = Ca + 0.8 × (4 - albumin), with calcium in mg/dL and albumin in g/dL. The SI form is different: Ca(mmol/L) + 0.02 × (40 - albumin in g/L). Entering SI numbers into this one gives a meaningless answer rather than an error, so check the units on your report. Ionised calcium is the better measure where it is available.

About

Calcium corrected for albumin, because most calcium is protein-bound and a low albumin makes total calcium read falsely low.

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