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    Corrected calcium (albumin-adjusted)

    Calculate albumin-corrected calcium when serum albumin is low or high.

    Enter values — the result appears instantly.

    For information only; not a substitute for medical advice. Data is neither sent nor stored.

    Formula

    Corrected Ca (mmol/L) = measured Ca + 0.02 × (40 − albumin in g/L).

    Reference ranges

    • 2.15–2.60 mmol/L (depending on the laboratory)

    Frequently asked questions

    When is ionized calcium preferred?
    In critically ill patients, acid-base disorders and severe hypoalbuminemia the correction is unreliable — direct measurement of ionized calcium is recommended.