2021 CKD-EPI Adult eGFR Calculator

Depending on which variables are provided, one of the following equations will be utilized:

• eGFRcr = 142 × min(SCr/κ,1)^α × max(SCr/κ,1)^-1.2 × 0.9938^Age × 1.012 (if female)
  • κ = 0.7 (females) or 0.9 (males)
  • α = -0.241 (females) or -0.302 (males)
• eGFRcys = 133 × min(Scys/0.8,1)^-0.499 × max(SCr/0.8,1)^-1.328 × 0.996^Age × 0.932 (if female)
• eGFRcr-cys = 135 × min(SCr/κ,1)^α × max(SCr/κ,1)^-0.544 × min(Scys/0.8,1)^-0.323 × max(Scys/0.8,1)^-0.778 × 0.9961^Age × 0.963 (if female)
  • κ = 0.7 (females) or 0.9 (males)
  • α = -0.219 (females) or -0.144 (males)

Notes: This Chronic Kidney Disease Epidemiology (CKD-EPI) calculator is for adults (people ages 18 and older). This calculator uses the race-free 2021 CKD-EPI equations to estimate GFR. The development of this calculator was led by Dr. Andrew S. Levy and Dr. Lesley A. Inker. Cystatin C is not available in all laboratories and most patients can be monitored with serum creatinine alone.