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BUN/Creatinine Ratio Calculator

Health & Fitness

Calculate the BUN to creatinine ratio used to help distinguish prerenal from intrinsic kidney causes.

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mg/dL
1 mg/dL150 mg/dL
mg/dL
0.1 mg/dL15 mg/dL

BUN/Creatinine Ratio

15.0

BUN to creatinine ratio. Educational reference only, not a substitute for clinical judgment.

Interpretation

General interpretation of the ratio. Within normal range (10-20)

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Odeh Ahwal

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Odeh Ahwal
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Frequently Asked Questions

What does the BUN/creatinine ratio tell you?

It helps distinguish whether reduced kidney function is likely caused by decreased blood flow to the kidneys (prerenal, ratio above 20) or by direct kidney tissue damage (intrinsic renal, ratio below 10).

What can cause a high BUN/creatinine ratio?

Dehydration, gastrointestinal bleeding, high protein intake, and heart failure are common causes of an elevated ratio, since they reduce blood flow to the kidneys without directly damaging kidney tissue.

Is a normal ratio enough to rule out kidney disease?

No. A normal ratio does not rule out kidney disease. It should always be interpreted alongside the absolute BUN and creatinine values and the overall clinical picture.

Is this calculator a substitute for medical advice?

No. This is an educational reference implementation of the standard BUN/creatinine ratio, not a substitute for a physicians clinical assessment.

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