Below the range
Common causes of a low Calcium, Total (Ca²⁺)
- Hypoparathyroidism
- Vitamin D deficiency
- Chronic kidney disease
- Low albumin (total only)
Looking for the other direction? See what causes a high Calcium, Total (Ca²⁺).
All tests · Electrolytes & Minerals · Calcium, Total (Ca²⁺)
Below the range
What causes a low Calcium, Total (Ca²⁺)?
Normal range 8.6-10.2 mg/dL (2.15-2.55 mmol/L SI). Specimen: Serum. See the full Calcium, Total (Ca²⁺) reference page for critical values and nursing considerations.
What is the normal range for Calcium, Total (Ca²⁺)?
The standard teaching reference range for Calcium, Total (Ca²⁺) is 8.6-10.2 mg/dL in conventional units, or 2.15-2.55 mmol/L in SI units. This value is measured in serum.
| Specimen | Serum |
|---|---|
| Conventional range | 8.6-10.2 mg/dL |
| SI range | 2.15-2.55 mmol/L |
| Critical value | < 6.0 or > 13.0 mg/dL |
| Panel | Electrolytes & Minerals |
Full details, including nursing considerations, on the Calcium, Total (Ca²⁺) 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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