GFR Calculator

What is the GFR Calculator?

The GFR (Glomerular Filtration Rate) Calculator estimates how well your kidneys are functioning by calculating the rate at which blood is filtered by the glomeruli in your kidneys. It uses your serum creatinine level, age, race, and gender to estimate GFR using three prevalent formulas: CKD-EPI, MDRD, and Cockcroft-Gault.

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Why Use the Calculator?

1. Kidney Health: Helps assess kidney function and detect potential kidney disease.
2. Medical Monitoring: Assists healthcare providers in monitoring patients with chronic kidney disease (CKD).
3. Personalized Results: Provides GFR estimates using multiple formulas for comparison.

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How Does the Calculator Work?

The calculator uses the following steps:

1. Input Your Details:
   • Age: Enter your age in years.
   • Gender: Select your gender (male or female).
   • Race: Select your race (Black or Non-Black).
   • Serum Creatinine: Enter your serum creatinine level in mg/dL.
2. Calculation:
   • The calculator uses three formulas to estimate GFR:
     • CKD-EPI: A modern formula recommended for general use.
     • MDRD: A widely used formula for estimating GFR.
     • Cockcroft-Gault: An older formula that estimates creatinine clearance.
3. Result:
   • The calculator displays GFR estimates from all three formulas.

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Example Calculation

• Input:
  • Age: 50
  • Gender: Male
  • Race: Non-Black
  • Serum Creatinine: 1.2 mg/dL
• Output:
  • CKD-EPI GFR: 68.45 mL/min/1.73m²
  • MDRD GFR: 65.32 mL/min/1.73m²
  • Cockcroft-Gault GFR: 70.83 mL/min

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GFR Categories

• Normal: GFR ≥ 90 mL/min/1.73m²
• Mild Reduction: GFR 60-89 mL/min/1.73m²
• Moderate Reduction: GFR 30-59 mL/min/1.73m²
• Severe Reduction: GFR 15-29 mL/min/1.73m²
• Kidney Failure: GFR < 15 mL/min/1.73m²

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Limitations of the Calculator

1. General Estimate: The calculator provides an estimate and may not account for individual variations like muscle mass or medical conditions.
2. Consult a Doctor: For precise evaluation, consult a healthcare provider and consider additional tests.

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How to Use the Calculator

1. Enter your age, gender, race, and serum creatinine level.
2. Click the Calculate button.
3. The result will display GFR estimates from the CKD-EPI, MDRD, and Cockcroft-Gault formulas.

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Tips for Kidney Health

1. Stay Hydrated: Drink plenty of water to support kidney function.
2. Balanced Diet: Limit salt, protein, and processed foods to reduce kidney strain.
3. Monitor Blood Pressure: High blood pressure can damage kidneys over time.
4. Avoid Overuse of Medications: Some medications can harm kidneys if used excessively.
5. Regular Check-ups: Schedule regular kidney function tests if you have risk factors for kidney disease.