Enter your height and weight into the calculator to determine your estimated body surface area.

## BSA Formula

The following formula is used to calculate your body surface area.

BSA = SQRT ( H * W / 3600 )

- Where BSA is your body surface area (m^2)
- H is your height (cm)
- W is your weight (kg)

This equation can be adjusted to use pounds and inches as the units as well. The calculator does this for you.

## BSA Definition

BSA is defined as the total surface area of one’s body, also known as body surface area.

## BSA Example

How to calculate BSA?

**First, measure your height.**Measure your height and convert the units to cm.

**Next, measure your weight.**Measure your weight and convert the units to kg.

**Finally, calculate your BSA.**Using the formula above along with your height and weight, calculate your BSA.

## FAQ

**What is BSA?**

BSA stands for body surface area. It’s a measure of the total estimated surface area that a human body occupies based on height and weight. The formula was derived from averages over populations, so the exact surface area may vary.

**What is a normal BSA?**

There is no definite good amount of body surface area. Since muscle also increases size and surface area, sometimes a higher BSA is not bad. A better indicator of fitness and health is body fat percentage.