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Glomerular Filtration Rate (GFR)

CALCULATORS

Use our GFR calculators to estimate GFR for adults or children.

eGFR Calculator

Pediatric GFR Calculator

Cockcroft-Gault formula (use for drug research only)

Kidney Failure Risk Equation...

Estimated Glomerular Filtration Rate (eGFR)

GFR

GFR as a measure for kidney function

GFR (glomerular filtration rate) is equal to the total of the filtration rates of the functioning nephrons in the kidney. GFR is considered the optimal way to measure kidney function, which in conjunction with albuminuria, can help determine the extent of CKD in an individual. The level of GFR and its magnitude of change over time are vital to:

the detection of kidney disease

How is the GFR calculated?

You can go to our website and have the estimated glomerular filtration rate (eGFR) calculated. You need to enter the appropriate information at: http://www.kidney.org/professionals/kdoqi/gfr.cfm

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What are creatinine levels and GFR?

You can go to our web site and learn this for yourself at: http://www.kidney.org/professionals/kls/pdf/12-10-4004_KBB_FAQs_AboutGFR-1.pdf

Blog: Ask the Doctor Blog

I am a CKD 3 patient with a GFR of <35, currently under excellent care. I have been stable for over 5 years now. I recently had updated labs and was found to have a potassium of 5.2. I was told to go by my "low potassium food list." However, I am having problems with the nutrition facts for foods that I purchase. Some of them do not even list potassium. I would like to know my maximum potassium mg or grams per day. I have been trying to ask my nephrologist and his staff/nutritionist but am having difficulty getting in touch with them this time of year. Can you give me an idea of how much potassium is too much?

A low potassium diet generally has between 2000 and 3000 milligrams of potassium per day. There is a web site that lists the electrolyte contents of foods. You can visit this site at: http://ndb.nal.usda.gov/

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an I take Augmentin 875 with a GFR of 39?

Augmentin (Amoxicillin and Clavulanate) can be taken in patient with chronic kidney disease (CKD) and an estimated glomerular filtration rate (eGFR) of 39 milliliters per minute per 1.73 meters squared. The dose is often reduced in patients with an eGFR of 39. I recommend that you discuss this with your physician to make sure...

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Track Your GFR and Albuminuria Numbers

Use this handy sheet to keep track of your GFR and albuminuria results. After each test, fill in your GFR number and albuminuria result, along with the date you were tested.

What is GFR?

GFR stands for "glomerular filtration rate." Your GFR helps you know how much kidney function you have.
GFR is estimated from a simple blood test. You...

STANDARDIZED ASSAYS FOR CALCULATING GFR IN ADULTS

All GFR estimating formulas on this site are designed for use with standardized creatinine and standardized cystatin C values.
- Standardized creatinine values are traceable to isotope dilution mass spectrometry (IDMS).
- Standardized cystatin C values are traceable to the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC)/Institute for Reference Materials and Measurements (IRMM) working...

If my GFR is 11, can I reverse it?

If your estimated glomerular filtration rate (eGFR) is 11 milliliters per minute per 1.73 meters squared and you have chronic kidney disease (CKD), then it is likely not reversible. If your kidney disease is acute kidney disease, then it may be reversible...

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