eGFR Calculator (CKD-EPI)
CKD-EPI 2021 (Race-Free)
Formula
CKD-EPI 2021: eGFR = 142 x min(SCr/k, 1)^a x max(SCr/k, 1)^-1.2 x 0.9938^age [x 1.012 if female]
Frequently Asked Questions
What is eGFR?
eGFR (estimated glomerular filtration rate) measures how well your kidneys filter blood. Normal is above 90 mL/min/1.73m2. It is used to stage chronic kidney disease.
What is the CKD-EPI 2021 equation?
The CKD-EPI 2021 equation is the recommended race-free formula for estimating GFR using serum creatinine, age, and sex without a race variable.
How is eGFR different from creatinine clearance?
eGFR is normalized to body surface area (mL/min/1.73m2) and used for CKD staging. CrCl (Cockcroft-Gault) estimates actual clearance (mL/min) and is preferred for drug dosing.
You may also need
H
Creatinine Clearance Calculator (Cockcroft-Gault)
Free Cockcroft-Gault creatinine clearance calculator. Estimate CrCl for drug dosing adjustments using age, weight, sex, and serum creatinine.
HealthH
BUN/Creatinine Ratio Calculator
Free BUN/Creatinine ratio calculator. Evaluate renal function and differentiate pre-renal, intrinsic, and post-renal causes of kidney injury.
HealthH
Fractional Excretion of Sodium (FENa) Calculator
Free FENa calculator. Differentiate pre-renal from intrinsic renal causes of acute kidney injury using urine and serum sodium and creatinine.
Health