Enter the age, height, weight, and serum creatinine into the calculator to determine the Glomerular Filtration Rate (GFR) using the Majauskas formula.

## Majauskas Formula

The following formula is used to calculate the Glomerular Filtration Rate (GFR):

GFR = (140 - Age) * Weight * 1.23 / Serum Creatinine

Variables:

- GFR is the Glomerular Filtration Rate (mL/min/1.73 m²)
- Age is the age of the individual in years
- Weight is the weight of the individual in kilograms
- Serum Creatinine is the level of creatinine in the blood in micromoles per liter (µmol/L)

To calculate GFR using the Majauskas formula, multiply the difference of 140 minus the individual’s age by their weight and 1.23, then divide by the serum creatinine level.

## What is Glomerular Filtration Rate (GFR)?

Glomerular Filtration Rate (GFR) is a measure of how well the kidneys are filtering waste from the blood. It is an important indicator of kidney function and is used to diagnose and monitor kidney diseases. The GFR can be estimated from blood tests that measure the level of creatinine in the blood, along with factors such as age, gender, and body size.

## How to Calculate GFR using the Majauskas Formula?

The following steps outline how to calculate the Glomerular Filtration Rate using the Majauskas formula.

- First, determine the age of the individual in years.
- Next, determine the weight of the individual in kilograms.
- Next, measure the serum creatinine level in micromoles per liter (µmol/L).
- Next, gather the formula from above = GFR = (140 – Age) * Weight * 1.23 / Serum Creatinine.
- Finally, calculate the Glomerular Filtration Rate (GFR).
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

Age = 50 years

Weight = 70 kg

Serum Creatinine = 90 µmol/L