Creatinine Clearance Calculator
Cockcroft–Gault creatinine clearance with actual, ideal and adjusted weight.
Enter your values to see the result.
Cockcroft–Gault estimates creatinine clearance, which many drug labels still use for renal dose adjustment. It is shown with actual, ideal and adjusted body weight because the right choice depends on body size and local guidance. For education and clinical decision support only. Results do not replace professional judgment, local protocols or the product information, so always verify doses and values before acting on them.
Continue your work
- eGFR Calculator — Stage kidney function with CKD-EPI.
- Adjusted Body Weight Calculator — Work out ideal and adjusted weight.
Share this tool
Found it useful? Send it to a friend or teammate.
Rate this tool
0.0
0 ratings
- 5 stars 0
- 4 stars 0
- 3 stars 0
- 2 stars 0
- 1 star 0
Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Creatinine Clearance Calculator
Cockcroft–Gault creatinine clearance with actual, ideal and adjusted weight.
- 1 Enter sex, age, weight, height and serum creatinine.
- 2 Read the clearance calculated with the recommended body weight.
- 3 Compare the values for actual, ideal and adjusted weight.
Example and practical tips
A 65-year-old man weighing 90 kg, 170 cm tall, with creatinine 1.1 mg/dL has a clearance of about 72 mL/min using adjusted body weight.
Further reading
Frequently asked questions
Why is Cockcroft–Gault still used when eGFR exists?
Most drug labels base their renal dose adjustments on Cockcroft–Gault clearance, so pharmacists still use it for dosing.
Which weight should I use?
A common rule is actual weight if below ideal, ideal weight up to 120% of ideal and adjusted weight above that. Follow your local guidance.
Can I use this to make treatment decisions?
It supports education and clinical decision-making but does not replace clinical judgment, local protocols or product information. Always double-check results.
Report an issue
Something broken or not quite right? Tell us and we will look into it.