Creatinine Clearance Calculator (Cockcroft-Gault formula)
Calculated Creatinine Clearance:
Calculated as follows:
For male patients creatinine clearance ml.min =
( (140 − age) x ( weight in kg ) x 1.23 )
serum creatinine in umol/l
For female patients multiply the above by 0.85
For patients who appear to be significantly overweight use their ideal body weight (
Ideal body weight calculator
) to work out their creatinine clearance
This calculator is based on the Cockcroft-Gault formula and is suitable for adults only.
Creatinine clearance is an estimation of GFR but, if the patient is morbidly obese, anuric or in acute renal failure this equation will not give a true reflection of GFR.
Do not use the eGFR reported on the Results Review biochemistry system for drug dosing purposes. Use creatinine clearance worked out using the Cockcroft-Gault formula above.