BUN Creatinine Ratio Calculator

Calculate your BUN to Creatinine Ratio to assess kidney function. Enter your Blood Urea Nitrogen (BUN) and Creatinine levels in mg/dL to get results in standard, step-by-step, or chart views.

Standard
Step by Step
Chart

Result

Detailed Steps

Visual Representation

Formula

The BUN to Creatinine Ratio is calculated by dividing Blood Urea Nitrogen (BUN) by Creatinine, both measured in mg/dL:

BUN Creatinine Ratio = BUN (mg/dL) ÷ Creatinine (mg/dL)

Interpretation

The normal BUN to Creatinine Ratio typically ranges from 10:1 to 20:1, though this may vary slightly by age and gender:

  • Normal (10–20): Indicates healthy kidney function.
  • Low (<10): May suggest malnutrition, liver disease, or low protein intake.
  • High (>20): May indicate dehydration, kidney disease, or high protein intake.

Normal Creatinine Ranges

Serum creatinine levels provide additional context:

  • Men: 0.74–1.35 mg/dL (65.4–119.3 µmol/L)
  • Women: 0.59–1.04 mg/dL (52.2–91.9 µmol/L)
  • General: 0.7–1.3 mg/dL (62–115 µmol/L)

High Creatinine (>1.3 mg/dL): Possible kidney disease or high muscle mass.

Low Creatinine (<0.7 mg/dL): Possible malnutrition, muscle atrophy, or severe liver disease.

Consult a healthcare provider for accurate diagnosis and personalized advice.

How to Use the BUN Creatinine Ratio Calculator

  1. Enter your Blood Urea Nitrogen (BUN) level in mg/dL (e.g., 20).
  2. Enter your Creatinine level in mg/dL (e.g., 1).
  3. Select your preferred display mode (Standard, Step by Step, or Chart).
  4. Click the “Calculate” button.
  5. View your BUN to Creatinine Ratio and interpretation in the selected view. The chart view shows your ratio compared to normal, low, and high ranges.

Frequently Asked Questions (FAQs)

What is the BUN to Creatinine Ratio?

It’s a renal function indicator calculated as BUN (mg/dL) ÷ Creatinine (mg/dL), used to diagnose kidney disease or damage.

What does a high BUN to Creatinine Ratio mean?

A ratio >20 may indicate dehydration, kidney disease, high protein intake, or gastrointestinal bleeding. Consult a healthcare provider for diagnosis.

What does a low BUN to Creatinine Ratio mean?

A ratio <10 may suggest malnutrition, low protein intake, liver disease, or overhydration. Consult a healthcare provider for diagnosis.

How can I reduce a high BUN to Creatinine Ratio?

Stay hydrated, adopt a kidney-friendly diet, manage blood pressure and blood sugar, exercise regularly, avoid NSAIDs, and monitor levels with a healthcare provider.

Why are creatinine levels important?

Creatinine levels (normal: 0.7–1.3 mg/dL) reflect kidney function and muscle mass. High or low levels may indicate kidney issues, malnutrition, or other conditions.