1. What is the GFR Calculator With Creatinine Levels?

This calculator estimates glomerular filtration rate (GFR) from serum creatinine, age, sex, and race using a standard equation. It provides an assessment of kidney function based on these parameters.

2. How Does the Calculator Work?

The calculator uses the GFR equation:

Where:

• \( Cr \) — Serum creatinine (mg/dL)
• \( Age \) — Age in years
• 0.742 — Female multiplier
• 1.212 — African American race multiplier

Explanation: The equation accounts for the inverse relationship between creatinine and GFR, with adjustments for age, gender, and race.

3. Importance of GFR Calculation

Details: GFR estimation helps in evaluating kidney function, detecting kidney disease, and monitoring disease progression.

4. Using the Calculator

Tips: Enter creatinine in mg/dL, age in years, select gender and race. All values must be valid (creatinine > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What is a normal GFR value?
A: Normal GFR is typically ≥90 mL/min/1.73m², though values decrease with normal aging.

Q2: Why does race affect GFR calculation?
A: Muscle mass and creatinine production vary by race, requiring adjustment factors for accurate estimation.

Q3: When should I get my creatinine checked?
A: When evaluating kidney function, monitoring known kidney disease, or before certain medical procedures.

Q4: Are there limitations to this equation?
A: Accuracy may be reduced in very elderly, malnourished individuals, or those with extreme muscle mass.

Q5: How often should GFR be calculated?
A: Frequency depends on clinical context - from annually for screening to more frequently with known kidney disease.