GFR Calculator

What Stage Am I In?

There are five stages of kidney disease. Your glomerular filtration rate (GFR)–considered by medical professionals to be the best measure of kidney function–lets kidney care experts figure out your stage of kidney disease. Understanding it can help you learn how to take control and make any change to certain lifestyle habits in order to possibly slow the progression of your condition. Determining your GFR levels requires a simple blood test. Use this GFR Calculator tool to help you determine which stage of kidney disease you are in currently.

What Your GFR Result Means

Completely healthy kidney function is measured at a glomerular filtration rate (GFR) of around 100, which means that the kidneys are working at 100 percent. Your kidney function is still considered normal if the GFR number is 90 or greater. If your GFR is 45, you know that your kidneys are working at approximately 45 percent of the normal rate.

Understanding your GFR can help you learn how to take control and slow the progression of your condition.

Empower yourself with kidney knowledge.

Get your questions answered in a no-cost Kidney Smart® class.

Factors associated with the progression of kidney disease:

  • Uncontrolled blood pressure
  • High glucose
  • Excessive use of pain medications
  • Smoking
  • Tests using dye
  • Obesity

More about the DaVita GFR Calculator

The DaVita GFR Calculator uses the CKD-EPI Creatinine (2021) equation. The National Kidney Foundation and American Society of Nephrology recommend using this equation to estimate GFR.


CKD-EPI GFR Calculator: A GFR Calculator on Nephron.com (By Stephen Z. Fadem, M.D., FACP, FASN) | MDRD GFR Calculator: A GFR Calculator on Nephron.com (By Stephen Z. Fadem, M.D., FACP, FASN) | Pediatric GFR Calculator: A GFR Calculator for children and adolescents up to 18 yrs old (By Stephen Z. Fadem, M.D., FASN and Brian Rosenthal) | National Kidney Foundation FAQs about GFR estimates: More information about GFR

Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. KDIGO 2012 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney inter., Suppl. 2013; 3: 1-150. | Levey AS, Stevens LA, Schmid CH, Zhang YL, Castro AF 3rd, Feldman HI, Kusek JW, Eggers P, Van Lente F, Greene T, Coresh J. A New Equation to Estimate Glomerular Filtration Rate. Ann Intern Med. 2009; 150:604-612.

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