Is BUN Creatinine ratio 8.5 normal, high or low? What does BUN Creatinine ratio level 8.5 mean?

📅 Medical Review Date: September 10, 2025

Your BUN Creatinine ratio level of 8.5 is a Normal BUN Creatinine ratio level.

Normal BUN Creatinine ratio levels may indicate underlying health problems. The normal range is typically between 5 Ratio and 15 Ratio. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal BUN Creatinine ratio range for men is :5 - 15 Ratio

Ideal values of BUN Creatinine ratio depending on age (male) :

Age	Ideal BUN Creatinine ratio value
<5 years	5.425
5-10 years	5.886
10-15 years	6.386
15-20 years	6.929
20-25 years	7.518
25-30 years	8.157
30-35 years	8.85
35-40 years	9.602
40-45 years	10.418
45-50 years	11.304
50-55 years	12.265
55-60 years	13.308
60-70 years	14.439
70-80 years	14.334
80-90 years	14.23
90-100 years	14.128
>100 years	14.026

*Ideal values are calculated based on our database of patient records

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Some examples of conditions that increase or decrease BUN Creatinine ratio levels include:

• Kidney failure
• Decreased blood flow to the kidneys
• Dehydration
• Conditions that can block the flow of urine
• Congestive heart failure

Receive world-class medical opinion about your normal BUN Creatinine ratio levels over email.Upload blood test report now

Normal range of BUN Creatinine ratio found among women :5-15 Ratio

Ideal values of BUN Creatinine ratio depending on age (female) :

Age	Ideal BUN Creatinine ratio value
<5 years	5.438
5-10 years	5.914
10-15 years	6.432
15-20 years	6.995
20-25 years	7.607
25-30 years	8.273
30-35 years	8.997
35-40 years	9.785
40-45 years	10.642
45-50 years	11.574
50-55 years	12.587
55-60 years	13.689
60-70 years	14.887
70-80 years	14.773
80-90 years	14.659
90-100 years	14.546
>100 years	14.435

If you take a BUN Creatinine ratio blood test and the results are not in the normal range (5-15 Ratio), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the BUN Creatinine ratio Test Is Done :

When your doctor orders a BUN Creatinine ratio test, it involves a straightforward blood draw to measure your BUN Creatinine ratio levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your BUN Creatinine ratio test results are usually available within a few hours.

Medical References

• WebMD – Blood Urea Nitrogen (BUN) Test: High vs. Low Levels, Normal Range
• NIH – The meaning of the blood urea nitrogen/creatinine ratio in acute kidney injury