Creatinine Clearance Calculator

Your details

Cockcroft-Gault was derived in adults; it is not validated for children.
years
Female clearance is multiplied by 0.85 to reflect lower average muscle mass.
kg
Used for BMI, body surface area and the ideal/adjusted body weight options.
cm
A recent blood-test value. 1.0 mg/dL equals 88.4 µmol/L.
mg/dL
Pharmacists often use ideal weight near normal BMI and adjusted weight in obesity to avoid overestimating clearance.
Creatinine clearanceMildly reduced
88mL/min
Clearance per 1.73 m² (BSA-normalized)82mL/min/1.73m²
Weight used in the formula70kg
Ideal body weight (Devine)70.5kg
Body mass index22.9kg/m²
Body surface area (Mosteller)1.84m²
88 mL/min
Kidney failure<15Severe15-30Moderate30-60Mild60-90Normal90+

Your estimated creatinine clearance is about 88 mL/min (using 70 kg of body weight).

  • Cockcroft-Gault is the estimate pharmacists rely on most to set safe doses of kidney-cleared drugs.
  • A single creatinine reading can be skewed by hydration, recent meat intake or muscle mass, so trends matter more than one value.
  • Clearance naturally falls with age even in healthy kidneys, because the (140 − age) term shrinks as you get older.

Next stepDiscuss any result below 60 mL/min with your doctor, who may order repeat or eGFR testing.

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