Simple GFR Calculator
Calculate your estimated Glomerular Filtration Rate (eGFR) to assess kidney function.
Your GFR Results
mL/min/1.73m²
| Equation | eGFR (mL/min/1.73m²) | Interpretation |
|---|---|---|
| CKD-EPI (2021) | ||
| MDRD Study | ||
| Cockcroft-Gault |
GFR Classification:
| GFR Range | Category | Description |
|---|---|---|
| ≥90 | G1 | Normal or high kidney function |
| 60-89 | G2 | Mildly decreased kidney function |
| 45-59 | G3a | Mildly to moderately decreased kidney function |
| 30-44 | G3b | Moderately to severely decreased kidney function |
| 15-29 | G4 | Severely decreased kidney function |
| <15 | G5 | Kidney failure |
Medical Disclaimer
This calculator is for informational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for proper interpretation of your results.
Understanding GFR
GFR (Glomerular Filtration Rate) is the best overall indicator of kidney function. It measures how well your kidneys filter blood and is essential for diagnosing kidney disease.
GFR Classification
- G1 (≥90 mL/min/1.73m²) - Normal or high kidney function
- G2 (60-89 mL/min/1.73m²) - Mildly decreased kidney function
- G3a (45-59 mL/min/1.73m²) - Mildly to moderately decreased kidney function
- G3b (30-44 mL/min/1.73m²) - Moderately to severely decreased kidney function
- G4 (15-29 mL/min/1.73m²) - Severely decreased kidney function
- G5 (<15 mL/min/1.73m²) - Kidney failure
When to Consult a Doctor
- Always