The calculator estimates the glomerular filtration rate (GFR) using the CKD-EPI equation 2. The equation is not applicable to persons under 18 years of age.
CalculatorGFR values over 60 ml/min/1.73 m2 without other signs suggestive of a renal disease (persistent proteinuria or haematuria, microalbuminuria in a patient with diabetes, structural renal defect) require no further investigations or follow-up.
The CKD-EPI is not suitable for the diagnostics of acute renal failure, as is the case with all other calculations that are based on creatinine concentration (the change in creatinine concentration is too slow).
| Renal function | GFR ml/min/1.73 m2 |
|---|---|
| Normal renal function | >90 |
| Mild renal failure (insignificant if there are no other signs of renal disease) | 60-89 |
| Moderate renal failure | 30-59 |
| Severe renal failure | 15-29 |
| End-stage renal failure; dialysis patient | <15 |
Check drug dosage from relevant databases. Notice that the severity grades of renal failure may be defined differently in some databases compared with this calculator.
eGFR (ml/min/1.73 m2) = 142 x min(Scr/κ, 1)α x max(Scr/κ, 1)-1.200 x 0.9938Age x 1.012 [if female]
where:
Scr = standardised plasma or serum creatinine (mg/dl)
κ= 0.7 (female) or 0.9 (male)
α= -0.241 (female) or -0.302 (male)
min(Scr/κ, 1) is the minimum of Scr/κ or 1.0
max(Scr/κ, 1) is the maximum of Scr/κ or 1.0
Age is expressed in full years. It must be at least 18 years.
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