Urea

Renal Unit: mg/dL

Serum urea — measured differently from BUN in some labs

Also known as: Serum Urea,Blood Urea

Reference Ranges

Clinical Reference 15.0 – 45.0 mg/dL

Optimal Range 20.0 – 40.0 mg/dL

Critical Range > 214.0 mg/dL

Urea (whole molecule) = BUN × 2.14; do NOT confuse with BUN

Upload your blood test to see how your Urea compares to reference and optimal ranges.