Glomerular filtration rate reflects how quickly your kidneys filter blood. This tool estimates it from serum creatinine, age and sex.
The equation used is the 2021 version, which has no race coefficient. The earlier version adjusted results for Black patients; that term was removed because race is a social rather than a biological variable and its inclusion delayed care.
Fill in your details and press calculate — your result will appear here.
Formula and method
The CKD-EPI 2021 creatinine equation. The result is normalised to a body surface area of 1.73 m² and staged against the KDIGO categories.
Formula used
CKD-EPI 2021 creatinine equation (race-free)
Assumptions and limits
- The equation has only been validated on adults and will not compute for anyone under 18.
- Serum creatinine is affected by muscle mass, diet and some medications. Interpreting the result is a clinician's job.
Scientific sources
Inker LA, Eneanya ND, Coresh J, et al. “New Creatinine- and Cystatin C-Based Equations to Estimate GFR without Race.” N Engl J Med. 2021;385(19):1737-1749.
View sourceKidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. “KDIGO 2012 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease.” Kidney Int Suppl. 2013;3(1):1-150.