Glomerular Filtration Rate (GFR)

GFR, or glomerular filtration rate, is a number that tells us how well your kidneys are working. Your kidneys act like filters, cleaning your blood by removing waste and extra fluid. GFR measures how much blood your kidneys filter each minute.

• GFR of 90 or above: Normal kidney function.
• GFR between 60–89: Mild decrease in kidney function.
• GFR between 30–59: Moderate decrease—this is often when chronic kidney disease (CKD) is diagnosed.
• GFR between 15–29: Severe decrease in kidney function.
• GFR below 15: Kidney failure—dialysis or a transplant may be needed

If you have chronic kidney disease (CKD), your GFR helps your healthcare provider understand how advanced your condition is and what steps to take next. A lower GFR means your kidneys are not filtering as well as they should, which can lead to a buildup of waste in your body.

Even if your GFR is low, there are ways to protect your kidneys and slow down further damage:

• Control blood pressure and blood sugar
• Eat a kidney-friendly diet
• Avoid certain medications that can harm the kidneys
• Stay active and hydrated
• Follow your treatment plan closely