# BUN/Creatinine Ratio Calculator

> Calculate the blood urea nitrogen (BUN) to serum creatinine ratio to help evaluate kidney function and hydration status.

**URL:** https://www.calculatoranswers.com/bun-creatinine-ratio-calculator
**Category:** Health

## Quick Answer

Enter your blood urea nitrogen (BUN) and serum creatinine levels to find their ratio. It is used clinically as a general indicator of kidney health and hydration.

## Definition

The BUN/creatinine ratio is a diagnostic calculation used to help identify the causes of kidney dysfunction or dehydration. Blood urea nitrogen (BUN) and creatinine are both metabolic waste products filtered by the kidneys. A high ratio (typically over 20:1) can point to dehydration or pre-renal factors, whereas a lower or normal ratio (between 10:1 and 20:1) combined with elevated levels usually indicates intrinsic kidney damage.

## How to Use

1. **Enter BUN level** — Input your Blood Urea Nitrogen (BUN) value in mg/dL from your lab report.
2. **Enter serum creatinine level** — Input your serum creatinine value in mg/dL from your lab report.
3. **Read the ratio** — View the estimated ratio and the corresponding clinical significance band.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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