eGFR Calculator
Estimated Glomerular Filtration Rate — kidney function assessment (CKD-EPI 2021)
Enter Blood Report Values
mg/dL
Results
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Enter your serum creatinine from your blood report.
Formula
CKD-EPI 2021 (race-free): eGFR = 142 × min(Scr/κ, 1)^α × max(Scr/κ, 1)^−1.200 × 0.9938^Age [×1.012 if female]
- Scr (mg/dL) — Serum creatinine
- κ (–) — 0.7 (female) or 0.9 (male)
- α (–) — −0.241 (female) or −0.302 (male)
Example: Male, 40 y, Creatinine 1.0 mg/dL → eGFR ≈ 90 mL/min/1.73m²
Interpreting Your Result
≥ 90
G1 — Normal
Normal or high kidney function
60–89
G2 — Mildly decreased
Mildly reduced
45–59
G3a — Mild–moderate
CKD stage 3a
30–44
G3b — Moderate–severe
CKD stage 3b
15–29
G4 — Severely decreased
CKD stage 4
< 15
G5 — Kidney failure
Dialysis or transplant may be required
Frequently Asked Questions
What is eGFR?
Estimated Glomerular Filtration Rate measures how well your kidneys filter waste from blood. It's derived from creatinine, age, and gender.
Can eGFR improve?
Yes. Managing blood pressure, blood sugar, and avoiding nephrotoxic medications can slow decline and sometimes improve eGFR.