Creatinine Clearance Calculator
Cockcroft-Gault kidney function.
Enter your values
Enter the age in years.
Enter the weight in kg.
Enter the serum creatinine in mg/dL.
Choose one of: Male, Female.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Creatinine clearance
- 70.4 mL/min
- Kidney function stage
- Mildly reduced
- Dose adjustment likely?
- Usually not
- Serum creatinine
- 1.2 mg/dL
Quick answer
Cockcroft-Gault estimates creatinine clearance from age, weight, sex and serum creatinine, and is still used for renal drug dosing.
CrCl = ((140 − age) × kg × F) / (72 × SCr)
At a glance
| What it does | Cockcroft-Gault kidney function. |
|---|---|
| Category | Health |
| Inputs needed | Age, Weight, Serum creatinine, Sex |
| Main output | Creatinine clearance |
| Formula | CrCl = ((140 − age) × kg × F) / (72 × SCr) |
| Cost | Free — no sign-up, no download |
How to use the Creatinine Clearance Calculator
- 1Enter age and body weight.
- 2Enter serum creatinine in mg/dL.
- 3Select sex for the correction factor.
Inputs explained
- Age(years)
- Enter the age in years.
- Weight(kg)
- Enter the weight in kg.
- Serum creatinine(mg/dL)
- Enter the serum creatinine in mg/dL.
- Sex
- Choose one of: Male, Female.
Worked example
Using the values the calculator loads with:
Inputs
- Age62 years
- Weight78 kg
- Serum creatinine1.2 mg/dL
- SexMale
Results
- Creatinine clearance70.4 mL/min
- Kidney function stageMildly reduced
- Dose adjustment likely?Usually not
- Serum creatinine1.2 mg/dL
Frequently asked questions
Cockcroft-Gault or eGFR?
Drug labels are usually based on Cockcroft-Gault; eGFR is used for CKD staging.
Which weight should I use?
Ideal or adjusted body weight in obesity — actual weight overestimates clearance.
What do I need to enter into the Creatinine Clearance Calculator?
Just 4 values: age, weight, serum creatinine, sex. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Creatinine Clearance Calculator work out the answer?
Cockcroft-Gault estimates creatinine clearance from age, weight, sex and serum creatinine, and is still used for renal drug dosing. It applies the formula CrCl = ((140 − age) × kg × F) / (72 × SCr) and shows the working so you can check each step by hand.
Is the Creatinine Clearance Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.