GFR Calculator (MDRD)

eGFR = 175 × SCr⁻¹·¹⁵⁴ × Age⁻⁰·²⁰³

CKD Staging

Input Parameters

Age (years)

Serum Creatinine (mg/dL)

Gender

Race

Examples

CKD Stages

Stage 1: ≥90

Stage 2: 60‑89

Stage 3a: 45‑59

Stage 3b: 30‑44

Stage 4: 15‑29

Stage 5: <15

Drug Dosing

GFR >60: normal; 30‑60: reduce; <30: avoid many.