Units
BUN (urea-N) is g/dL in the United States, Italy, Austria, Germany. Elsewhere, the concentration of urea is reported as mmol/L, generally depending on the lab.
To convert from mg/dL of blood urea nitrogen to mmol/L of urea, multiply by 0.357 (each molecule of urea having 2 nitrogens, each of molar mass 14g/mol)
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- Urea = BUN x 10 / 14x2
convert BUN to urea in mg/dL by using following formula:
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- Urea = BUN * 2.14
(conversion factor derived by: MW of urea = 60, MW of urea nitrogen = 14x2 => 60/28 = 2.14)
factor = 1 for conversions in mmol (1 mole N2 = 2 moles N per mole of urea):
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- BUN = urea
Read more about this topic: Blood Urea Nitrogen
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