eGFR equations

All 19 equations in the calculator, with the biomarkers they use and the population they were validated in. Each page covers the formula, constants, notes and source references.

EquationBiomarkersValidated forYearOpen
EKFCCreatinine2+ years2021
CKD-EPI 2021Creatinine18+ years2021
EKFC Creatinine-Cystatin CCreatinine + cystatin C18+ years2023
CKD-EPI 2021 Creatinine-Cystatin CCreatinine + cystatin C18+ years2021
EKFC Cystatin CCystatin C18+ years2023
CKD-EPI 2012 Cystatin CCystatin C18+ years2012
CKiD U25Creatinine1–25 years2021
CKiD U25 Creatinine-Cystatin CCreatinine + cystatin C1–25 years2021
CKiD U25 Cystatin CCystatin C1–25 years2021
Bedside SchwartzCreatinine1–16 years2009
Neonatal eGFRCreatinine0–4 weeks2022
FASCreatinine2+ years2016
CAPACystatin C1+ years2014
Lund-MalmöCreatinine18+ years2011
BISCreatinine70+ years2012
CKD-EPI 2009Creatinine18+ years2009
MDRDCreatinineAdults (no age range declared)2006
Cockcroft-GaultCreatinineAdults (no age range declared)1976
KRSCreatinineKidney transplant recipients, 18+ years2023

Validated age ranges

Axis split into infants, children and adults

InfantsChildrenAdults01510184070120 yEKFCEKFC: 2+ yearsCKD-EPI 2021CKD-EPI 2021: 18+ yearsEKFC Cr-CysCEKFC Cr-CysC: 18+ yearsCKD-EPI 2021 Cr-CysCCKD-EPI 2021 Cr-CysC: 18+ yearsEKFC CysCEKFC CysC: 18+ yearsCKD-EPI 2012 CysCCKD-EPI 2012 CysC: 18+ yearsCKiD U25CKiD U25: 1–25 yearsCKiD U25 Cr-CysCCKiD U25 Cr-CysC: 1–25 yearsCKiD U25 CysCCKiD U25 CysC: 1–25 yearsBedside SchwartzBedside Schwartz: 1–16 yearsNeonatalNeonatal: 0–4 weeksFASFAS: 2+ yearsCAPACAPA: 1+ yearsLund-MalmöLund-Malmö: 18+ yearsBISBIS: 70+ yearsCKD-EPI 2009CKD-EPI 2009: 18+ yearsMDRDMDRD: no age range declaredCockcroft-GaultCockcroft-Gault: no age range declaredKRSKRS: 18+ years

Outlined bars: no declared age range (shown from 18 by adult type), or a special population.