Estimate adult kidney filtration with the race-free 2021 CKD-EPI creatinine equation using age, sex coefficient and serum creatinine.
Printed from Calxy · https://www.calxy.net/health/gfr-calculator
18 – 120
0.01 – 5000
Estimated GFR (2021 CKD-EPI creatinine)
91.7 mL/min/1.73 m²
Adult estimate, not measured kidney filtration or a diagnosis. Creatinine may be unreliable with rapidly changing kidney function or unusual muscle mass. Clinical interpretation also needs history and urine findings; the combined creatinine–cystatin C equation is preferred when available. This indexed value is not automatically a medication dose.
eGFR = 142 × min(SCr/κ, 1)^α × max(SCr/κ, 1)^−1.200 × 0.9938^age × sex factor.
Female: κ = 0.7, α = −0.241, factor = 1.012. Male: κ = 0.9, α = −0.302, factor = 1.
Convert creatinine in µmol/L to mg/dL by dividing by 88.4.
eGFR = 142 × min(SCr/κ,1)^α × max(SCr/κ,1)^−1.200 × 0.9938^age, multiplied by 1.012 for the female coefficient. κ is 0.7 for female and 0.9 for male; α is −0.241 or −0.302 respectively.
For age 50, the male coefficient and standardized creatinine 1 mg/dL, the estimate is about 91.7 mL/min/1.73 m². Entering 88.4 µmol/L gives the same result.
No. Interpretation depends on persistence, urine findings, medical history and measurement limitations. Combined creatinine–cystatin C estimation is preferred when available, especially near important clinical thresholds.
Last updated . Results are estimates for informational purposes only.