Glomerular Filtration Rate Calculator

Calculate Glomerular Filtration Rate (GFR) using the CKD-EPI formula to assess kidney function.

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About This Tool

This GFR calculator estimates glomerular filtration rate using the validated CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) formula. Enter your age, gender, serum creatinine level, race, and measurement units to get an accurate eGFR value with corresponding CKD stage classification. The tool provides immediate results with clear interpretation to help assess kidney function.

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How to Use

Enter your age in years
Select your gender
Input serum creatinine value
Choose measurement units (mg/dL or μmol/L)
Select your race (African American or non-African American)
Click 'Calculate GFR' to get your estimated glomerular filtration rate
View your result with CKD stage classification and interpretation

Frequently Asked Questions

Find Quick Answers

What is GFR and why is it important?

GFR (Glomerular Filtration Rate) measures how well your kidneys filter waste from your blood. It's the best overall indicator of kidney function and helps diagnose and monitor kidney disease.

Which formula does this calculator use?

This calculator uses the CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) formula, which is currently recommended by clinical guidelines as it provides more accurate estimates across different age groups and creatinine levels.

What do the different CKD stages mean?

CKD stages range from 1 (normal kidney function with some kidney damage) to 5 (kidney failure). Stage 1: GFR ≥90, Stage 2: GFR 60-89, Stage 3: GFR 30-59, Stage 4: GFR 15-29, Stage 5: GFR <15.

Is this calculator suitable for medical diagnosis?

No, this tool provides estimates for educational purposes only. Always consult a healthcare professional for medical diagnosis and treatment decisions regarding kidney health.

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