What health calculators are available on Calc4Health?

Calc4Health offers 17+ professional health calculators including BMI, BMR, TDEE, body fat percentage, target heart rate, daily water intake, waist-hip ratio, Cooper test, relative fat mass, body surface area, body adiposity index, body shape index, conicity index, heart rate zones, new BMI Trefethen calculator, Blood Alcohol Content (BAC) calculator, and Dietary Reference Intake (DRI) calculator.

Are Calc4Health calculators free to use?

Yes, all health calculators on Calc4Health are completely free to use. No registration or payment required. Access professional medical calculation tools instantly for your health and fitness monitoring needs.

How accurate are the health calculators?

Calc4Health calculators use scientifically validated formulas and equations from medical research. They provide accurate estimates based on established medical standards, though results should be used for reference and not replace professional medical advice.

Body Roundness Index (BRI) Calculator

Quantify body shape and estimate body fat percentage using a geometric index based on body eccentricity.

Patient Information

Waist Circumference

Height

BRI Result

Complete the form to view your calculation

Understanding BRI

BRI models the body as an ellipse to quantify body roundness. Scores range from 1-16, with most people between 1-10.

Health Implications

BRI predicts body fat percentage and health risks better than BMI. Values ≥6.9 show up to 49% increased mortality risk.

Clinical Usage

Introduced in 2013, BRI doesn't require weight measurement and provides accurate estimates of visceral adipose tissue.

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BRI Formula

BRI = 364.2 - 365.5 × eccentricity

Calculation Steps

1. Calculate WHtR = Waist ÷ Height

2. Calculate eccentricity = √(1 - (WHtR/π)²)

3. Calculate BRI = 364.2 - 365.5 × eccentricity

Medical Reference

Wikipedia - Body Roundness Index

Comprehensive information on BRI calculation, formula derivation, health implications, and comparison with BMI.

View Wikipedia Article

Author

Dr. Beltrán J.F.