Calculator · Renal / metabolic

Corrected (adjusted) calcium

Albumin-adjusted serum calcium.

What it is for

Interpreting calcium with low/high albumin — hypercalcaemia work-up, myeloma, bone profile.

Use the working calculator

The working Corrected (adjusted) calcium calculator is on our calculators page. It is free and needs no account. Enter the values and it shows the result with the reading that goes with it.

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What you enter

The calculator asks for 2 items.

  • Measured calcium (mmol/L)
  • Albumin (g/L)

How the result is read

The result is shown as Corrected Ca²⁺ in mmol/L. Formula: Corrected Ca = measured Ca + 0.02 × (40 − albumin g/L)

The calculator reports one of these readings, with the action that goes with it: Hypocalcaemia; Normal; Mild hypercalcaemia; Significant hypercalcaemia.

Sources

These are the sources the calculator cites. Check the current version before relying on a threshold.

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For qualified clinicians. A score supports a clinical decision and does not make it: check the inputs, read the cited source, and use the tools in your clinical system for patient care where one is provided.