📋 Reference Range Trainer
Master all ASCP BOC examination reference ranges
These reference ranges are provided for examination preparation purposes only. They are not intended to replace a laboratory's validated clinical reference intervals. They are derived from ASCP BOC composite ranges (published September 2025).
| Analyte | Conventional Units | SI Units |
|---|---|---|
| Sodium | 136–145 mmol/L | 136–145 mmol/L |
| Potassium | 3.5–5.1 mmol/L | 3.5–5.1 mmol/L |
| Chloride | 98–107 mmol/L | 98–107 mmol/L |
| Total CO₂ | 22–33 mmol/L | 22–33 mmol/L |
| Creatinine | 0.8–1.2 mg/dL | 71–106 µmol/L |
| BUN | 6–20 mg/dL | 2.1–7.1 mmol/L |
| Glucose (fasting) | 74–100 mg/dL | 4.1–5.6 mmol/L |
| Hemoglobin A1c | < 5.7% | < 39 mmol/mol |
| Haptoglobin | 30–200 mg/dL | 0.3–2.0 g/L |
| Arterial pH | 7.35–7.45 | 7.35–7.45 |
| pCO₂ | 35–44 mm Hg | 4.7–5.9 kPa |
| pO₂ | > 80 mm Hg | > 10.6 kPa |
| O₂ Saturation | > 95% | > 95% |
| Bicarbonate (HCO₃⁻) | 23–29 mmol/L | 23–29 mmol/L |