Glomerular filtration rate measures how much blood the kidneys filter each minute. It is the main measure for staging chronic kidney disease.
How to use the eGFR Calculator
- Sex
- Age
- Serum creatinine
Results update as you type, and every field accepts the units shown in its menu.
How it works
Creatinine is scaled by a sex-specific constant, and the equation adjusts for age.
Inputs explained
| Field | What to enter |
|---|---|
| Sex | Choose one: Male, Female |
| Age | In years |
| Serum creatinine | Units: mg/dL, µmol/L |
Example values
How the main result changes when Age changes and everything else stays at the example values above:
| Age (years) | eGFR (mL/min/1.73 m²) |
|---|---|
| 27.5 | 94 |
| 41.25 | 86 |
| 55 | 79 |
| 68.75 | 73 |
| 82.5 | 67 |
| 110 | 56 |
Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.
Formula
eGFR = 142 × min(Scr/κ, 1)^α × max(Scr/κ, 1)^−1.200 × 0.9938^age × 1.012 [female]κ = 0.7 (F) / 0.9 (M), α = −0.241 (F) / −0.302 (M)Worked example
Inputs — Sex: Male; Age: 55 years; Serum creatinine: 1.1 mg/dL.
Results — eGFR = 79 mL/min/1.73 m².
Key terms
- GFR
- Glomerular filtration rate.
Frequently asked questions
Why was race removed?
The 2021 equation dropped the race coefficient to avoid bias; it is now the recommended standard in the U.S.
Does one result diagnose CKD?
No, CKD requires reduced eGFR or kidney damage for at least three months.
What formula does the eGFR Calculator use?
eGFR = 142 × min(Scr/κ, 1)^α × max(Scr/κ, 1)^−1.200 × 0.9938^age × 1.012 [female].