CKD-EPI Equations for Estimated GFR
Select female or male so the calculator applies the correct 2021 CKD-EPI constants.
Adults only. For ages 18 to 25, compare this adult estimate with the pediatric CKiD U25 calculator.
years
Enter IDMS-standardized serum creatinine in mg/dL.
mg/dL
Clinical noticeEducational support only. Do not use as a standalone diagnosis, definitive drug-dosing authority, or substitute for measured GFR and clinical judgment.
Context and use
Formula
eGFR = 142 x min(Scr/k, 1)^a x max(Scr/k, 1)^(-1.200) x 0.9938^age x 1.012 if female
Constants: female k = 0.7 and a = -0.241; male k = 0.9 and a = -0.302.
Use IDMS-standardized serum creatinine in mg/dL; output is mL/min/1.73 m².
