eGFR Calculator
Enter age, sex and serum creatinine to estimate eGFR and CKD stage with the CKD-EPI 2021 equation.
Input Data
Results
At a glance:CKD-EPI 2021: kappa = male 0.9 / female 0.7; alpha = male -0.302 / female -0.241; eGFR = 142 * min(Scr/kappa,1)^alpha * max(Scr/kappa,1)^(-1.200) * 0.9938^age * (female 1.012). Stages: >=90 G1, 60-89 G2, 30-59 G3, 15-29 G4, <15 G5.
Formula
eGFR = 142 * min(Scr/kappa,1)^alpha * max(Scr/kappa,1)^(-1.200) * 0.9938^age * (female?1.012:1).
stage by eGFR thresholds above.
How to Use
- Enter age, sex and serum creatinine (mg/dL).
- Get eGFR and the CKD stage.
Case Studies
50yo male, creatinine 1.0
kappa=0.9, alpha=-0.302; eGFR ~ 142 * 1 * 1 * 0.9938^50 * 1 ~ 95 mL/min/1.73m2 -> G1.
FAQ
Does low eGFR mean kidney disease?
It needs to be combined with urine albumin and clinical assessment; a single value also fluctuates - interpret with your doctor.
Why the 2021 equation?
CKD-EPI 2021 improved accuracy and is race-neutral, now the mainstream standard.
Related Tools
References
Content reviewed by the Calculatorism editorial team. Results are for reference only; please refer to the relevant authorities for the official figures.