Nephrology · Internal Medicine · Endocrinology
Albumin-Adjusted Calcium (Payne) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
mg/dL
Allowed range: 4–16 mg/dL
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g/dL
Allowed range: 1–6 g/dL
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Result
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Clinical inputs
- Total calcium (mg/dL)Accepted range: 4 to 16
- Albumin (g/dL)Accepted range: 1 to 6
Primary source
Payne RB et al. Interpretation of serum calcium in patients with abnormal serum proteins. BMJ. DOI: 10.1136/bmj.4.5893.643. PMID: 4758544. Scope: Albumin-adjusted total calcium (mg/dL) ≈ measured total calcium + 0.8 × (4 − albumin g/dL). This estimates albumin-adjusted total calcium, not ionized calcium. (1973)
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