Home Back

Body Roundness Index Calculator

BRI Equation:

\[ BRI = 364.2 - 365.5 \times \sqrt{1 - \left(\frac{Waist}{2\pi Height}\right)^2} \]

m
m

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is the Body Roundness Index?

The Body Roundness Index (BRI) is a measure of body shape and fat distribution that estimates the roundness of the human body. It provides an indicator of health risks associated with abdominal obesity.

2. How Does the Calculator Work?

The calculator uses the BRI equation:

\[ BRI = 364.2 - 365.5 \times \sqrt{1 - \left(\frac{Waist}{2\pi Height}\right)^2} \]

Where:

Explanation: The equation calculates body roundness based on the ratio of waist circumference to height, providing a measure of abdominal obesity.

3. Importance of BRI Calculation

Details: BRI is important for assessing health risks associated with abdominal obesity, including cardiovascular disease, diabetes, and metabolic syndrome.

4. Using the Calculator

Tips: Enter waist circumference in meters and height in meters. All values must be valid (waist > 0, height > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is a normal BRI value?
A: Normal BRI values typically range from 1 to 10, with higher values indicating greater abdominal obesity and health risks.

Q2: How does BRI compare to BMI?
A: BRI focuses specifically on abdominal fat distribution, while BMI provides a general measure of body weight relative to height.

Q3: How should waist circumference be measured?
A: Measure at the midpoint between the lower rib and the top of the hip bone, at the end of a normal expiration.

Q4: Are there limitations to BRI?
A: BRI may be less accurate in individuals with extreme body shapes or certain medical conditions affecting body composition.

Q5: Can BRI be used for all populations?
A: While BRI is generally applicable, specific risk thresholds may vary by age, sex, and ethnicity.

Body Roundness Index Calculator© - All Rights Reserved 2025