Enter serum calcium and albumin from the patient's lab report

Units:

Serum Calcium (mg/dL)

Normal: 8.5–10.5 mg/dL

Serum Albumin (g/dL)

Normal: 3.5–5.0 g/dL

Ionized Calcium (optional) (mmol/L) Normal: 1.12–1.32 mmol/L

Correction Formula

Corrected Calcium

—

mg/dL

Status

Not Calculated

—

Measured Calcium

—

as reported

Correction Applied

—

adjustment (mg/dL)

Albumin Deficit

—

below 4.0 g/dL

Calcium Reference Values

Normal Total Calcium8.5–10.5 mg/dL

Hypocalcemia< 8.5 mg/dL

Hypercalcemia> 10.5 mg/dL

Severe Hypercalcemia> 14.0 mg/dL

Normal Albumin3.5–5.0 g/dL

Ionized Calcium (normal)1.12–1.32 mmol/L

Payne Formula (Standard)

Corrected Ca = Measured Ca + 0.8 × (4.0 − Albumin)

For every 1 g/dL that albumin falls below 4.0, add 0.8 mg/dL to measured calcium.

Hypo- calcemia

<8.5

mg/dL

Normal

8.5–10.5

mg/dL

Hyper- calcemia

>10.5

mg/dL

Corrected Calcium Calculator