eGFR Calculator — CKD-EPI 2021 (Creatinine)
Estimate glomerular filtration rate (eGFR) from serum creatinine using the 2021 race-free CKD-EPI equation, the current KDIGO-endorsed standard for staging chronic kidney disease in adults.
When to use it
Use to stage CKD (G1 to G5), screen kidney function, and adjust renally-cleared drug doses. The 2021 equation removes the race coefficient and is preferred over the older 2009 CKD-EPI and MDRD formulas.
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), where k = 0.7 (female) or 0.9 (male).
Category
Kidney Function
References
- Inker LA, et al. New Creatinine- and Cystatin C-Based Equations to Estimate GFR without Race. N Engl J Med. 2021;385:1737-1749.
- KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of CKD.
About NephroMind
This calculator is part of NephroMind, a free clinical decision-aid platform from the Arab Society of Nephrology and Renal Transplantation (ASNRT) — over 128 bedside nephrology calculators plus a renal drug-dosing database, coded by a practicing transplant nephrologist.