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Creatinine Clearance Calculator

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Cockcroft & Gault




Calculated Creatinine Clearance (Cockcroft and Gault Formula)
NB: Requires creatinine measurement in umol/L
Plasma creatinine (umol/l)
Age (years)
Weight (kg)
Sex (m or f) (lower case only)

Creatinine clearance (mL/min):

  90 - 150 mL/min


{(140 - Age) x wt (kg) x F} / (Plasma Creatinine * 0.8136)
Where F = 1 if male, and 0.85 if female
  • Enter data in table and creatinine Clearance will be calculated according to the Cockcroft and Gault Formula (Nephron 1976;16:31-41).
  • Suitable for adults only.
  • The required inputs are plasma creatinine, age, weight and sex.
  • Note that the result will differ from the true value at extremes of body composition.
  • The data is not stored electronically all transcriptions must be checked for errors.
(with thanks to M R Holland, Knowledge in Capsular Form)
Last updated 20/08/2007