Calculated Creatinine Clearance

For MALES

SI units
Creatinine clearance (mL/min) = 1.23 * Weight (kg) * (140 - Age (y)) / Creatinine (micromol/L)

Mass units
Creatinine clearance (mL/min) = Weight (kg) * (140 - Age (y)) / Creatinine (mg/dL) * 72

For FEMALES

Validity

Valid for ages 18 - 92 years.

Normal values

Normal values are 120 (males) or 95 (females) +/- 20 mL/minute.

REFERENCE

Cockcroft DW, Gault MH. Prediction of creatinine clearance from serum creatinine. Nephron 1976;16(1):31-41