GFR (Glomerular Filtration Rate) measures how well the kidneys filter blood. Learn the normal GFR ranges for different groups and factors that influence GFR levels. eGFR Calculator Glomerular filtration rate (GFR) is the best overall index of kidney function. Normal GFR varies according to age, sex, and body size, and declines with age. The National Kidney Foundation (NKF) and the American Society of Nephrology (ASN) convened a Task Force in 2021 to focus on the use of race when estimating GFR. Learn about glomerular filtration rate (GFR), a test that measures how well your kidneys filter waste products and excess fluids. Find out what's normal, abnormal, and how diabetes affects GFR and kidney disease risk. Learn about eGFR, its significance for kidney health, and how to calculate it effectively. Read the article for essential insights and practical guidance.
