The normal range for glomerular filtration rate, or GFR, is 90 to 120 milliliters per minute, per 1.73 m2, as stated by MedlinePlus. Due to sample and measurement variations among different labs, the normal range may vary from one lab to another.
The GFR is a blood test that determines the effectiveness of the kidney in purifying the blood by measuring the amount of blood that runs through the glomeruli, which filter the kidneys, in a single minute, explains MedlinePlus. In most cases, doctors perform GFR tests on patients suffering from chronic kidney disease. Abnormal results may indicate kidney failure.