Complete guide
Creatinine Clearance Calculator: formula, example and decision guide
Estimate adult creatinine clearance with the Cockcroft–Gault equation from age, weight, sex and serum creatinine. The result updates instantly and keeps every assumption visible.
What the Creatinine Clearance Calculator measures
Estimate adult creatinine clearance with the Cockcroft–Gault equation from age, weight, sex and serum creatinine.
Use the result to compare scenarios built from the same definitions and time period.
Formula and variables
The calculator applies CrCl = (140 − age) × weight ÷ (72 × serum creatinine), multiplied by 0.85 for the female coefficient. Each variable is entered in a labeled field and remains visible beside the answer.
CrCl = (140 − age) × weight ÷ (72 × serum creatinine), multiplied by 0.85 for the female coefficientWorked example
A 55-year-old, 70 kg male with creatinine 1.0 mg/dL estimates 82.64 mL/min.
Change one input at a time to see which assumption has the greatest effect on the result.
How to interpret the result
Read the main result together with the detailed rows; the headline number alone does not describe every cost, unit or assumption.
Save comparable scenarios with the copy, link, CSV or PDF controls.
Assumptions and limitations
Drug dosing may require a specified weight method, stable kidney function and clinician interpretation; this is not eGFR.
Real contracts, measurements, platform rules and professional standards can add inputs that this general-purpose model does not infer.
Accuracy checklist
Confirm units, time periods, fees and source figures before relying on the output.
Round the displayed answer only after the calculation; intermediate values retain full precision.
Calculation audit
| Item | What to review |
|---|---|
| Inputs | Equation sex, Age (years), Weight (kg), Serum creatinine (mg/dL) |
| Equation | CrCl = (140 − age) × weight ÷ (72 × serum creatinine), multiplied by 0.85 for the female coefficient |
| Example | A 55-year-old, 70 kg male with creatinine 1.0 mg/dL estimates 82.64 mL/min. |
| Limit | Drug dosing may require a specified weight method, stable kidney function and clinician interpretation; this is not eGFR. |
Frequently asked questions
What does this Creatinine Clearance Calculator calculate?
Estimate adult creatinine clearance with the Cockcroft–Gault equation from age, weight, sex and serum creatinine.
Which formula does it use?
CrCl = (140 − age) × weight ÷ (72 × serum creatinine), multiplied by 0.85 for the female coefficient
Does it calculate while I type?
Yes. Valid changes update the result automatically without reloading the page.
Which inputs should I verify?
Verify every unit, period, rate and fee against the source you are modeling.
Is the result exact?
Drug dosing may require a specified weight method, stable kidney function and clinician interpretation; this is not eGFR.
Can I save or share the result?
Yes. Copy, native sharing, WhatsApp, PDF/Print, CSV, comparison and parameterized links are available.
What to keep in mind
Drug dosing may require a specified weight method, stable kidney function and clinician interpretation; this is not eGFR.
Results display up to 8 decimal places; exported numbers preserve calculation precision. This is a calculation summary, not an official certificate.