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Fluids & Electrolytes

Corrected Calcium (Payne)

Albumin-corrected serum calcium using the Payne correction (SI units).

Written for clinicians. If you're a parent or patient, don't act on these numbers — talk to your child's doctor.

Inputs

FieldUnitNotes
Calcium mmol/L Normal 2.25–2.625
Albumin g/L Normal 35–55

FAQ

What is the Corrected Calcium (Payne)?

Albumin-corrected serum calcium using the Payne correction (SI units).

What inputs does the Corrected Calcium (Payne) need?

Calcium (mmol/L), Albumin (g/L).

Related guides

Corrected Calcium (Payne Formula): Why the SI Coefficient Is 0.02, Not 0.8

Albumin-correcting total calcium with the Payne formula in SI units — the 0.02 per g/L coefficient, when hypoalbuminemia masks true calcium, a worked example, and why ionized calcium still wins.

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