Automatically applies the 2021 CKD-EPI creatinine equation for adults and the bedside Schwartz equation for pediatric patients.

The calculator selects CKD-EPI for ages ≥ 18 years and the bedside Schwartz equation for ages < 18 years. For pediatric patients, provide accurate height and weight to support the calculation and body surface area estimation.

Age (years)

Use chronological age in completed years (decimals allowed for infants).

Sex at birth

Serum Creatinine

Values entered in µmol/L are converted automatically (1 mg/dL = 88.4 µmol/L).

Height (cm)

Required for pediatric patients; optional for adults (also supports BSA estimation).

Weight (kg)

Required for pediatric patients; used to auto-calculate body surface area when available.

Result units

Results

Estimated GFR:

Formula Applied:

CKD GFR Category:

CKD GFR Categories (KDIGO 2024)

Category	eGFR (mL/min/1.73 m²)	Interpretation
G1	≥ 90	Normal or high (consider other markers of kidney damage)
G2	60–89	Mildly decreased (requires markers of kidney damage for CKD diagnosis)
G3a	45–59	Mildly to moderately decreased
G3b	30–44	Moderately to severely decreased
G4	15–29	Severely decreased
G5	< 15	Kidney failure

eGFR (Estimated GFR) Calculator

Results

CKD GFR Categories (KDIGO 2024)