Creatinine clearance calculator
Published On: 03/04/2026
Creatinine Clearance Calculator
Estimate creatinine clearance (CrCl) with the Cockcroft–Gault equation.
Inputs explained:
• Age: age in years.
• Sex: male or female.
• Weight: body weight in kg or lb.
• Serum creatinine: enter in mg/dL or µmol/L.
• Method: actual body weight, ideal body weight, or adjusted body weight.
• Age: age in years.
• Sex: male or female.
• Weight: body weight in kg or lb.
• Serum creatinine: enter in mg/dL or µmol/L.
• Method: actual body weight, ideal body weight, or adjusted body weight.
Important: This is an educational calculator, not medical advice. Creatinine clearance estimates can be inaccurate in pregnancy, amputations, edema, very low muscle mass, very high muscle mass, unstable kidney function, or rapidly changing creatinine. For medication dosing or clinical decisions, confirm with a clinician. The NKF says Cockcroft–Gault is an older equation and is no longer recommended for general use. :contentReference[oaicite:1]{index=1}
Creatinine Clearance Calculator — Description
The Creatinine Clearance Calculator estimates kidney function with the Cockcroft–Gault equation using age, sex, weight, and serum creatinine. The National Kidney Foundation describes Cockcroft–Gault as an older equation and says it is no longer recommended for general use, while NIDDK notes that the FDA does not require one specific estimating equation for drug dosing decisions. :contentReference[oaicite:2]{index=2}
This tool is best used as an educational estimate. For actual medication dosing, CKD staging, or diagnosis, lab-standardized methods and clinical judgment are needed. :contentReference[oaicite:3]{index=3}