Creatinine Clearance (CrCl)

Estimated creatinine clearance.

Cockcroft-Gault

Patient parameters

Adjust values, then click Calculate.

Age

0–120

Weight (kg)

1–300

Sex

Serum creatinine (mg/dL)

0–1000

Results

Creatinine Clearance (CrCl): 0.97 mL/min

What this calculator does

Creatinine clearance estimated by Cockcroft–Gault approximates kidney filtration using age, sex, weight, and serum creatinine. Clinicians historically used it for drug dosing, though institutional protocols increasingly specify CKD-EPI or measured GFR.

Formula and variables

Displayed formula: Cockcroft-Gault

The engine evaluates: Creatinine Clearance (CrCl) (mL/min). Variable names match the input field keys so you can trace each step from entry to output.

How to use this tool

1. Open the Creatinine Clearance (CrCl) and enter your values using the units shown beside each field.
2. Review that inputs are within the typical physiological range before you calculate.
3. Read the result together with the interpretation notes below and your local clinical context.

How to interpret the result

Higher values generally indicate better filtration. Very low clearance suggests dose adjustment for renally cleared medications and evaluation for chronic kidney disease when persistent.

Clinical context

Renal estimates fluctuate with hydration, muscle mass, and acute illness. Trend values over time and correlate with urine studies and blood pressure control.

Limitations and disclaimer

Unreliable in extremes of muscle mass, amputations, acute kidney injury, and unstable creatinine. Do not use as the sole criterion for dialysis initiation.