eGFR Calculator
Adult eGFR sketch in mL/min/1.73 m². Click any i for detail.
Labs
Creatinine (mg/dL)
i
Creatinine
Serum creatinine from the lab report. |
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|---|---|
Age
i
Age
Age in years. |
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Sex
i
Sex
CKD-EPI 2021 uses a female multiplier of 1.012 and different κ/α. |
How to use this calculator
- Copy creatinine from the lab (mg/dL).
- Enter age and sex as specified by the equation.
- Read eGFR and a KDIGO GFR category sketch.
- Cystatin-C and pediatric equations are not on this page.
Results explained
CKD-EPI 2021 dropped the race coefficient. κ is 0.7 (female) or 0.9 (male); α is −0.241 or −0.302.
Quick reference: KDIGO GFR categories
Categories describe GFR, not a full CKD stage (albuminuria matters too).
| Item | Detail |
|---|---|
| G1 | ≥ 90 |
| G2 | 60–89 |
| G3a / G3b | 45–59 / 30–44 |
| G4 / G5 | 15–29 / <15 |
Units are mL/min/1.73 m². Confirm the lab’s equation on the report.
How the estimate is built
142 × min(Scr/κ,1)^α × max(Scr/κ,1)^(−1.200) × 0.9938^age × (1.012 if female).
Example scenario
Scr 1.0 mg/dL, age 50, male → about 89 mL/min/1.73 m² (G2 on this sketch).
FAQ
Why no race box?
CKD-EPI 2021 is race-free by design.
µmol/L labs?
Divide by 88.4 to get mg/dL first.
Dosing?
Never dose drugs from this page.