Below the range
Common causes of a low Phosphate (Phosphorus)
- Refeeding syndrome
- Hyperparathyroidism
- DKA treatment
- Alcohol use disorder
Looking for the other direction? See what causes a high Phosphate (Phosphorus).
All tests · Electrolytes & Minerals · Phosphate (Phosphorus)
Below the range
What causes a low Phosphate (Phosphorus)?
Normal range 2.5-4.5 mg/dL (0.81-1.45 mmol/L SI). Specimen: Serum. See the full Phosphate (Phosphorus) reference page for critical values and nursing considerations.
What is the normal range for Phosphate (Phosphorus)?
The standard teaching reference range for Phosphate (Phosphorus) is 2.5-4.5 mg/dL in conventional units, or 0.81-1.45 mmol/L in SI units. This value is measured in serum.
| Specimen | Serum |
|---|---|
| Conventional range | 2.5-4.5 mg/dL |
| SI range | 0.81-1.45 mmol/L |
| Critical value | < 1.0 mg/dL |
| Panel | Electrolytes & Minerals |
Full details, including nursing considerations, on the Phosphate (Phosphorus) 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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