Creatinine Calculator Formula:
CRCL = (140 - A) * W * r /(72 * C)
Where:
A: Age, in years
W: Body weight, in pounds (lbs)
C: Serum Creatinine Level, in mg/dL
r: Sex difference ratio, 0.85 for woman, and 1 for man
CRCL: Creatinine Clearance Rate, in mL/min