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GeneralCorrected Ca

Corrected Calcium Calculator

Correct serum calcium for albumin level.

Input

mg/dL
g/dL

Corrected Calcium

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About

Corrected calcium adjusts the total serum calcium level for abnormal albumin levels. About 40% of calcium in blood is bound to albumin, so when albumin is low (hypoalbuminemia), the total calcium may appear falsely low even though ionized (active) calcium is normal. This calculator corrects for that effect.

Formula

Corrected Ca (mg/dL) = Serum Ca (mg/dL) + 0.8 × (4.0 − Albumin (g/dL))

Interpretation

Corrected Ca (mg/dL)Interpretation
< 8.5Hypocalcemia
8.5 – 10.5Normal
> 10.5Hypercalcemia

References

  1. Payne RB, et al. Interpretation of serum calcium in patients with abnormal serum proteins. Br Med J. 1973;4(5893):643-646.

FAQ

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Disclaimer

Educational and informational reference only. Not intended to replace professional medical advice, diagnosis, treatment, or independent verification.