Creatinine Clearance (Cockcroft-Gault Equation) Calculator

A Creatinine Clearance (Cockcroft-Gault Equation) Calculator estimates kidney function by calculating the clearance rate of creatinine from the blood. It uses a patient’s age, weight, sex, and serum creatinine level to provide an estimate of glomerular filtration rate (GFR), aiding in the assessment of renal health and medication dosing.

Creatinine Clearance Calculator

Gender
Age
years
Weight
kg
Serum creatinine

How Does the Calculator Work?

To use the calculator, you input your age, weight, gender, and blood creatinine level. The calculator then uses the Cockcroft-Gault Equation to give you an estimate of how well your kidneys are working.

Normal creatinine clearance values vary based on age, sex, and other factors. Here are the typical reference ranges:

Normal Creatinine Clearance Values

  • Adult Males (19-75 years): 97 to 137 mL/min (1.65 to 2.33 mL/s)
  • Adult Females (19-75 years): 88 to 128 mL/min (1.47 to 2.13 mL/s)
  • Younger Adults:
    • Males: 107-139 mL/min
    • Females: 87-107 mL/min
  • Older Adults: Values tend to decrease with age, generally falling about 6.5 mL/min per decade after age 401246.
  • Pregnancy: Creatinine clearance can increase, reaching up to 200 mL/min due to physiological changes.

Values below 80 mL/min are considered significant and may indicate impaired kidney function, while values above the normal range can occur in conditions like pregnancy or diabetes before nephropathy develops.

Example of Use

Imagine a 60-year-old man who weighs 70 kg and has a blood creatinine level of 1.2 mg/dL. By entering these details into the calculator, the doctor can find out how well his kidneys are filtering waste, which is crucial for his overall health.

What is Creatinine?

Creatinine is a waste product made by muscles when they use energy. It is usually removed from the blood by the kidneys. If the kidneys are not working well, creatinine levels in the blood can rise.

Why Measure Creatinine Clearance?

Measuring how much creatinine is cleared from the blood helps doctors see how well the kidneys are filtering waste. This is important because it can show if there are any problems with kidney function.

What is the Cockcroft-Gault Equation?

The Cockcroft-Gault Equation is a formula used to estimate the creatinine clearance rate. It takes into account a person’s age, weight, gender, and creatinine level in the blood. This helps provide a more accurate picture of kidney function.

Why is This Important?

Knowing your creatinine clearance can help doctors decide on the best treatment for kidney issues. It can also help monitor kidney health over time, especially for people with conditions like diabetes or high blood pressure.