Estimated Glomerular Filtration Rate (eGFR) is a key measure of how well your kidneys are filtering waste from your blood, commonly used to screen for kidney disease.
This calculator uses the MDRD (Modification of Diet in Renal Disease) formula, which estimates GFR from your serum creatinine level, age, and gender.
Example: A 45-year-old man with creatinine 1.0 mg/dL:
eGFR = 175 × (1.0)^-1.154 × (45)^-0.203 ≈ 81 mL/min/1.73m²
| eGFR Range | Stage |
|---|---|
| 90+ | Normal (Stage 1) |
| 60-89 | Mildly reduced (Stage 2) |
| 30-59 | Moderately reduced (Stage 3) |
| 15-29 | Severely reduced (Stage 4) |
| Below 15 | Kidney failure (Stage 5) |
A GFR of 90 or above is generally considered normal, while values below 60 for three months or more may indicate chronic kidney disease.
No, this is an estimate for general awareness only - always consult a doctor for proper kidney function testing and diagnosis.
Men typically have more muscle mass, which affects baseline creatinine levels, so the formula includes a correction factor for women.