Nephrology · Internal Medicine

BUN mg/dL to mmol/L calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Blood urea nitrogen, BUN (mg/dL)

mg/dL

Allowed range: 1–200 mg/dL

Result

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Clinical inputs

Blood urea nitrogen, BUN (mg/dL)Accepted range: 1 to 200

Primary source

Labcorp SI Unit Conversion Table (Conventional to SI / SI to Conventional columns). Urea nitrogen, blood (BUN): mg/dL × 0.357 = mmol/L; mmol/L × 2.80 = mg/dL. This calculator divides by 2.801 (28.01 g of nitrogen per mole of urea), so the result is urea (urea nitrogen) in mmol/L. (2026)

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