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BUN to Creatinine Ratio Calculator

Blood urea nitrogen (BUN): mg/dL
Serum creatinine (Cr): mg/dL

About BUN to Creatinine Ratio Calculator

The BUN to Creatinine Ratio Calculator is used to calculate the BUN to Creatinine Ratio (BUN:Cr).


In medicine, the BUN to creatinine ratio is the ratio of two serum laboratory values, the blood urea nitrogen (BUN) (mg/dL) and serum creatinine (Cr) (mg/dL). The ratio may be used to determine the cause of acute kidney injury.

The BUN to creatinine ratio calculation formula is as follows:

BUN to Creatinine Ratio = Blood urea nitrogen / Serum creatinine


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