Laboratory Medicine · Internal Medicine

Calcium mmol/L to mg/dL calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Calcium (mmol/L)

mg/dL

Allowed range: 0–400797.6 mg/dL

Result

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Clinical inputs

Calcium (mmol/L)Accepted range: 0.001 to 99999

Primary source

Labcorp SI Unit Conversion Table (Conventional to SI / SI to Conventional columns). Calcium, serum or ionized: mmol/L × 4 = mg/dL. This calculator multiplies by 4.008, from the atomic mass of calcium (40.08 g/mol). (2026)

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