Urea-to-Creatinine Ratio Calculator

What is the Urea-to-Creatinine Ratio?

The urea-to-creatinine ratio is a diagnostic indicator used to assess kidney function and identify potential causes of kidney impairment. It compares the blood levels of urea and creatinine, two waste products filtered by the kidneys.

Why is the Urea-to-Creatinine Ratio Important?

This ratio helps detect dehydration, distinguish between prerenal and renal causes of kidney dysfunction, and evaluate protein metabolism. Abnormal values can point to conditions such as acute kidney injury or chronic kidney disease.

How is the Urea-to-Creatinine Ratio Calculated?

The ratio is calculated by dividing the blood urea level by the blood creatinine level. If the measurements are not in the same unit, they are converted to mg/dL before calculation:

Conversion:
  Urea (mg/dL) = Urea (mmol/L) × 6
  Creatinine (mg/dL) = Creatinine (umol/L) ÷ 88.42

Urea-to-Creatinine Ratio:
  Ratio = Urea (mg/dL) ÷ Creatinine (mg/dL)

Example Calculation

Inputs:
  Urea Level: 5.5 mmol/L
  Creatinine Level: 100 umol/L

Conversion:
  Urea (mg/dL) = 5.5 × 6 = 33.00
  Creatinine (mg/dL) = 100 ÷ 88.42 = 1.13

Calculation:
  Urea-to-Creatinine Ratio = 33.00 ÷ 1.13 = 29.20

FAQs

What does an elevated Urea-to-Creatinine Ratio mean?

An elevated ratio often indicates dehydration, high protein intake, or gastrointestinal bleeding. It may also signal prerenal kidney dysfunction.

What does a low Urea-to-Creatinine Ratio indicate?

A low ratio is often associated with conditions such as advanced chronic kidney disease, low protein intake, or liver dysfunction.

What is the normal range for the ratio?

The normal range for the urea-to-creatinine ratio is typically **10:1 to 20:1** in mg/dL. Values outside this range may indicate an abnormality requiring further investigation.

**Disclaimer:** These health calculators are for informational purposes only and do not replace professional medical advice. Results may not be 100% accurate for all individuals. Always consult a healthcare professional before making any health decisions.

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