Enter the body surface area and age into the calculator to determine the aortic root diameter. This calculator helps to estimate the expected size of the aortic root based on body surface area and age.

Aortic Root Diameter Formula

The following formula is used to calculate the aortic root diameter:

ARD = 10 * BSA + (0.54 * Age)


  • ARD is the aortic root diameter (mm)
  • BSA is the body surface area (m²)
  • Age is the age of the individual (years)

To calculate the aortic root diameter, multiply the body surface area by 10 and add the product of 0.54 times the age of the individual.

What is Aortic Root Diameter?

The aortic root diameter is a measurement of the width of the aortic root, the portion of the aorta that is attached to the heart. This measurement is important in the diagnosis and management of conditions such as aortic aneurysms and other cardiovascular diseases. The size of the aortic root can vary based on body size and age, and it is important to have an accurate measurement for proper medical assessment.

How to Calculate Aortic Root Diameter?

The following steps outline how to calculate the Aortic Root Diameter:

  1. First, determine the body surface area (BSA) in square meters (m²).
  2. Next, determine the age of the individual in years.
  3. Use the formula ARD = 10 * BSA + (0.54 * Age) to calculate the aortic root diameter.
  4. Finally, calculate the Aortic Root Diameter (ARD) in millimeters (mm).
  5. 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.

Body Surface Area (BSA) = 1.7 m²

Age = 45 years