About this Calculator
Glomerular Filtration Rate (GFR) is the gold standard clinically for assessing kidney function. This calculator uses the CKD-EPI 2021 revision.
Formula & Calculations
Mathematical Formula
CKD-EPI 2021 Creatinine Equation
Adjusts for age, gender, and serum creatinine levels.
How to Calculate Step-by-Step
1
Input creatinine
Serum creatinine level in mg/dL.
2
Resolve staging
Categorize GFR result into kidney stages.
How to Use & Best Practices
Provide serum creatinine levels, age, and biological gender details.
Frequently Asked Questions
What is a normal GFR?
A GFR of 90 or above is considered normal kidney function.