KDIGO 2024 Guidelines - GFR & Albuminuria Classification
Calculate estimated glomerular filtration rate (eGFR) using the 2021 CKD-EPI creatinine equation and classify chronic kidney disease (CKD) stage according to KDIGO 2024 guidelines using both GFR category (G1-G5) and albuminuria category (A1-A3).
GFR Categories (G1-G5):
Albuminuria Categories (A1-A3):
UACR = Urine Albumin-to-Creatinine Ratio
2021 CKD-EPI equation (race coefficient removed in updated version)
Normal: 0.6-1.2 mg/dL (varies by lab)
Urine Albumin-to-Creatinine Ratio (optional but recommended)
Estimated glomerular filtration rate (eGFR) is the best overall indicator of kidney function. It's calculated from serum creatinine, age, and sex using validated equations like CKD-EPI. eGFR estimates how much blood passes through the glomeruli (kidney filters) each minute.
The urine albumin-to-creatinine ratio (UACR) detects kidney damage even when eGFR is normal. Albuminuria indicates damaged kidney filters and is an independent predictor of CKD progression and cardiovascular disease. KDIGO guidelines require both GFR and albuminuria for complete CKD staging.
Chronic kidney disease is defined as abnormalities of kidney structure or function, present for >3 months, with implications for health. This includes eGFR <60 mL/min/1.73m² OR markers of kidney damage (albuminuria, structural abnormalities, etc.) for >3 months.
The 2021 CKD-EPI creatinine equation removed the race coefficient from the 2009 equation, addressing concerns about using race in medical algorithms. This calculator uses the updated race-free equation, which provides more equitable kidney function assessment.