Urea unit converter
Kidney function indicator (BUN = urea nitrogen, common in the US)
Also known as: BUN, Blood urea nitrogen, Urea nitrogen, Serum urea, Carbamide, Urée
Converter
Enter a value in any unit and all other units fill in.
Worked example
5.15 mmol/L (middle of the reference range) = 0.309 g/L
Conversion formulas
| g/L | g/L = mmol/L × 0.06006 | mmol/L = g/L × 16.65 |
|---|---|---|
| mg/dL (BUN) | mg/dL (BUN) = mmol/L × 2.801 | mmol/L = mg/dL (BUN) × 0.357 |
| mg/dL (urea) | mg/dL (urea) = mmol/L × 6.006 | mmol/L = mg/dL (urea) × 0.1665 |
Reference range
| Unit | Adults |
|---|---|
| g/L | 0.1502 – 0.4685 |
| mmol/L | 2.5 – 7.8 |
| mg/dL (BUN) | 7.003 – 21.85 |
| mg/dL (urea) | 15.02 – 46.85 |
Source: Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011 · Last reviewed: 2026-10-14
Note from the source: 2.5-7.8 mmol/L (urea, not urea nitrogen). UK Pathology Harmony consensus of the Association for Clinical Biochemistry, the Institute of Biomedical Science and the Royal College of Pathologists.