GFR Calculator

CKD-EPI 2021 creatinine-based eGFR estimate (simplified).

GFR Calculator helps you cKD-EPI 2021 creatinine-based eGFR estimate (simplified). Enter age and serum creatinine, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the GFR calculator does GFR Calculator is built for body measurements, calories, and everyday health math. CKD-EPI 2021 creatinine-based eGFR estimate (simplified). You enter age and serum creatinine, then Simple Calculators computes the result instantly. These tools use widely published formulas. They are educational screens, not a diagnosis. How the math works Choose your Sex, then enter your Age and Serum creatinine in mg/dL (if your report shows µmol/L, divide by 88.4). The calculator uses the 2021 CKD-EPI creatinine equation, which does not use race: eGFR = 142 × (creatinine ÷ κ) raised to a set power × 0.9938 to the power of age, × 1.012 for women, where κ is 0.7 for women and 0.9 for men. The result, in mL/min/1.73 m² (millilitres per minute, scaled to an average body size), is placed in a kidney-function stage from G1 to G5. It is meant for adults whose kidney function is stable — always go over the result with your doctor. The formula: GFR = 142 × …