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Creatinine Clearance (Cockcroft Gault) Calculator

Work out creatinine clearance (cockcroft gault) instantly with clear inputs, formula shown and shareable results.

About Creatinine Clearance (Cockcroft Gault) Calculator

Applies the Cockcroft-Gault equation, still the reference method for many drug dose adjustments, using age, weight, sex and serum creatinine.

Formula

Cockcroft-Gault

CrCl (mL/min) = (140 - age) x weight (kg) x 0.85 if female / (72 x serum creatinine mg/dL)

Worked example

With the default values below, Creatinine Clearance (Cockcroft Gault) Calculator returns Creatinine clearance of 66.3. Change any input above and every figure here is recalculated in your browser.

Inputs used

Ageaccepts 18–110 years
65 years
Body weightaccepts 2–250 kg
70 kg
Serum creatinineaccepts 0.2–15 mg/dL
1.1 mg/dL
Sexone of Male, Female
Male

Results

Creatinine clearance
66.3 mL/min
Clearance
1.105 mL/s
Band
Mildly reduced

Step by step

  1. 1Values used
  2. 2Cockcroft-Gault
  3. 3Creatinine clearance= 66.3 mL/min
  4. 4Clearance= 1.105 mL/s
  5. 5Band= Mildly reduced

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Which weight should be used?

Actual weight in normal-weight people; many centres use ideal or adjusted body weight in obesity.

Why not use eGFR for dosing?

Many drug licences and renal dosing tables were derived using Cockcroft-Gault clearance, so it remains the stated basis.

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Creatinine Clearance (Cockcroft Gault) Calculator | Calcrivo