Glomerular filtration rate (GFR) Calculator
Your glomerular filtration rate (GFR) is a measure of your kidney function. Your GFR can be estimated from a routine measurement of creatinine in your blood. The GFR describes how many millilitres of blood the tiny filters (glomeruli) in your kidneys can filter within one minute.
If the glomeruli are not filtering enough blood to keep the body in a healthy state, the kidneys have an impaired or reduced function. In other words, if your GFR is too low, your kidneys may not be able to remove enough waste and redundant water from your blood.
eGFR = 141 x min(SCr/K, 1)a x max(SCr/K, 1)-1.209 x 0.993Age x 1.018 [if female] x 1.159 [if black]K = 0.7 (females) or 0.9 (males); a = -0.329 (females) or -0.411 (males); min = minimum of SCr/K or 1;
max = maximum of SCr/K or 1
Stages of chronic kidney disease on the basis of GFR
Defined by the level of GFR, there are 5 stages of chronic kidney disease (according to NKF-KDOQI Guidelines ). Stage 1 is the earliest, while Stage 5 represents kidney failure or end-stage renal disease (ESRD), respectively.
1 KDOQI Clinical Practice Guidelines for Chronic Kidney Disease: Evaluation, Classification and Stratification. Am J Kidney Dis 2002; 39 (Suppl 1): 1-222. http://www.kidney.org/professionals/KDOQI/guidelines_ckd/ (last visited 05.05.2010)
* Stage 5 is sometimes also called end-stage kidney failure or established renal failure
** Glomerular filtration rate, in ml/min/1.73m2
*** Hill NR, Fataboa ST, Oke JL et al. 2016