eGFR Calculator: CKD-EPI 2021

eGFR Calculator estimates the glomerular filtration rate from serum creatinine in adults and children. Current formulas, the GFR category on a colour scale and a ready-made summary, all on one screen. Adults (18 and over) • Main formula: CKD-EPI 2021 (recommended by KDIGO 2024, no race coefficient). • For comparison: MDRD for standardised creatinine and Cockcroft-Gault. • Cockcroft-Gault gives creatinine clearance in mL/min and, if height is entered, per 1.73 m² of body surface area (DuBois). Children (aged 1–17) • Main formula: bedside Schwartz (CKiD, 2009). • For comparison: CKiD U25 (2021), which accounts for sex and age, and Counahan-Barratt. • Categories are not used under the age of 2, and the app takes this into account. Result • eGFR in mL/min/1.73 m², KDIGO category G1–G5 and a colour scale with a marker. • Creatinine in µmol/L or mg/dL with unit conversion. • A one-line summary to copy or share. Handy • Reference tab with formulas, coefficients, categories, limitations and sources. • Light and dark theme, works offline, data stays on your phone. Important eGFR is an estimate from published formulas. It is less accurate with unusual muscle mass, in pregnancy and when creatinine is changing quickly. Results should be interpreted by a doctor. The app is not a medical device.

• Input fields with built-in units; creatinine switches between µmol/L and mg/dL right in the field • Decimal values are supported • New eGFR rounding setting: one decimal or whole numbers • CKD stage now follows the displayed value • Result bar above the keyboard • Tap outside a field to hide the keyboard; the menu and ads stay hidden while typing