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BUN Creatinine Ratio Calculator
Calculate Blood Urea Nitrogen to Serum Creatinine Ratio for renal assessment
BUN-to-Creatinine Ratio Guidelines:
• Normal range: typically 10:1 to 20:1
• Ratio > 20:1 suggests prerenal azotemia (e.g., dehydration, heart failure)
• Ratio < 10:1 suggests intrinsic renal damage, low protein intake, or acute tubular necrosis. Enter lab values below.
• Normal range: typically 10:1 to 20:1
• Ratio > 20:1 suggests prerenal azotemia (e.g., dehydration, heart failure)
• Ratio < 10:1 suggests intrinsic renal damage, low protein intake, or acute tubular necrosis. Enter lab values below.
Laboratory Values Input
Calculation Results
⚠️ Not medical advice. For educational and clinical laboratory reference only. BUN-to-creatinine ratios must be interpreted by a physician alongside clinical history and electrolyte testing.