🇺🇸 US Reference Range
7–18 mg/dL
🇪🇺 EU Reference Range (SI Units)
2.5–6.4 mmol/L
Mayo Clinic Reference Range
6–24 mg/dL
Note: Reference range for adults ≥18 years: Males 8-24 mg/dL, Females 6-21 mg/dL. Combined range: 6-24 mg/dL. <12 months: not established