Creatinine Clearance Calculator
Enter the required values below to run the educational estimation.
Understanding Creatinine Clearance
Creatinine is a waste product generated by normal muscle breakdown. Healthy kidneys filter it from the blood and excrete it in urine. Creatinine clearance measures the rate at which the kidneys clear creatinine from the blood plasma.
The Cockcroft-Gault Equation
Developed in 1976, the Cockcroft-Gault equation estimates creatinine clearance by incorporating body weight, age, sex, and serum creatinine. Because creatinine production is proportional to muscle mass, weight is a key variable in this classic formula.
Renal Function & Medication Clearance
Many medications are cleared by the kidneys. If kidney clearance is reduced, medications can accumulate in the bloodstream, increasing the risk of toxicity. Clinicians use clearance estimates to adjust drug dosages safely.
When to Seek Urgent Medical Attention
- Severe swelling in your feet, ankles, or hands.
- Shortness of breath, chest discomfort, or irregular heartbeat.
- Complete lack of urination or very dark, concentrated urine.
Frequently Asked Questions
The Cockcroft-Gault equation estimates creatinine clearance (CrCl) in milliliters per minute. Historically, it has been widely used by pharmacists to adjust medication dosages.
Creatinine clearance includes both filtered creatinine and a small amount secreted by the renal tubules, meaning it slightly overestimates true GFR.
