BRI Calculator – Body Roundness Index
Calculate your Body Roundness Index (BRI) using waist circumference and height. BRI is a modern metric that estimates body fat distribution and central obesity risk more accurately than BMI alone.
Measure around your belly button while standing, exhaling normally.
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BRI was developed by Diana Thomas et al. (2013) as a better predictor of body fat percentage and visceral adipose tissue than BMI. It uses waist circumference and height to model body shape as an ellipse, giving insight into central obesity — the type most linked to metabolic disease.
Why BRI is better than BMI:
Unlike BMI, which only uses weight and height, BRI accounts for body shape. Two people with the same BMI can have very different BRI scores depending on how much weight is carried around the waist (visceral fat).
Disclaimer: This calculator provides estimates for informational purposes only. Consult a healthcare professional for medical advice.