BUN/Creatinine Ratio
The BUN/Creatinine ratio compares blood urea nitrogen to creatinine levels to help determine the cause of kidney-related abnormalities. Both are waste products filtered by the kidneys, but they are a…
Category: Metabolic Panel
Also known as: bun/creatinine ratio, bun creatinine ratio, bun/cr ratio, bun cr, odnos urea/kreatinin
Reference range: 10–20 ratio (Source: ABIM)
Standard unit: ratio
High values may indicate
A high BUN/Creatinine ratio may indicate dehydration, gastrointestinal bleeding, high protein intake, or heart failure.
Low values may indicate
A low BUN/Creatinine ratio may indicate liver disease, malnutrition, or a very low-protein diet.
Frequently asked questions
- What is a normal BUN/Creatinine Ratio level?
- A typical reference range for BUN/Creatinine Ratio is 10–20 ratio (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is BUN/Creatinine Ratio measured in?
- BUN/Creatinine Ratio is most commonly reported in ratio. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do BUN/Creatinine Ratio reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track BUN/Creatinine Ratio over time?
- Yes. Upload results from any lab and BloodId charts your BUN/Creatinine Ratio over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
Analyze your BUN/Creatinine Ratio with AI