Below the range
Common causes of a low Calcium, Ionized
- Alkalosis
- Massive transfusion (citrate)
- Hypoparathyroidism
Looking for the other direction? See what causes a high Calcium, Ionized.
All tests · Electrolytes & Minerals · Calcium, Ionized
Below the range
What causes a low Calcium, Ionized?
Normal range 4.6-5.3 mg/dL (1.15-1.33 mmol/L SI). Specimen: Serum or whole blood. See the full Calcium, Ionized reference page for critical values and nursing considerations.
What is the normal range for Calcium, Ionized?
The standard teaching reference range for Calcium, Ionized is 4.6-5.3 mg/dL in conventional units, or 1.15-1.33 mmol/L in SI units. This value is measured in serum or whole blood.
| Specimen | Serum or whole blood |
|---|---|
| Conventional range | 4.6-5.3 mg/dL |
| SI range | 1.15-1.33 mmol/L |
| Critical value | < 3.2 or > 6.2 mg/dL |
| Panel | Electrolytes & Minerals |
Full details, including nursing considerations, on the Calcium, Ionized normal range page. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
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