Body Roundness Index (BRI) Calculator for Female US (inches)
Body Roundness Index (BRI) Calculator for Female US (inches)
The Body Roundness Index (BRI) is a measure used to assess body shape and health risks. Our free BRI calculator combines height and waist circumference measurements to evaluate the indicates of the human body.
How to Use
- Select your gender and preferred unit of measurement (cm or inches).
- Enter your height.
- Enter your waist circumference.
- Enter your age (optional).
- Click "Calculate" to see your Body Roundness Index (BRI).
- Use the "Copy" button to easily copy your result to the clipboard.
Understanding Your Body Roundness Index Calculator Results
- BRI < 3.41: Very lean body shape (lowest 20% of the population)
- 3.41 ≤ BRI < 4.45: Lean to average body shape (lower 20-40% of the population)
- 4.45 ≤ BRI < 5.46: Average body shape (middle 40-60% of the population)
- 5.46 ≤ BRI < 6.91: Above average body roundness (upper 60-80% of the population)
- BRI ≥ 6.91: High body roundness (top 20% of the population)
The formula of BRI
Where:
- ( H ) is the height.
- ( WC ) is the waist circumference.
Average Body Roundness Index (BRI) by Age and Gender
Males
| Age Range | Mean ± SD |
|---|---|
| 18-29 years | 2.91 ± 0.98 |
| 30-39 years | 3.54 ± 1.12 |
| 40-49 years | 3.92 ± 1.18 |
| 50-59 years | 4.21 ± 1.23 |
| 60-69 years | 4.35 ± 1.25 |
| ≥70 years | 4.31 ± 1.27 |
Females
| Age Range | Mean ± SD |
|---|---|
| 18-29 years | 2.61 ± 0.89 |
| 30-39 years | 3.13 ± 1.12 |
| 40-49 years | 3.67 ± 1.30 |
| 50-59 years | 4.25 ± 1.40 |
| 60-69 years | 4.61 ± 1.46 |
| ≥70 years | 4.71 ± 1.51 |
Quick Guide to Accurate Waist Measurement
- Measure at the narrowest point of the waist, typically just above the belly button.
- Stand straight with feet together and use a non-stretchable measuring tape.
- Measure at the end of a normal breath to get the most accurate reading.
- Use consistent measurements for the same person over time to track changes.
Frequently Asked Questions
1. Is the BRI better than BMI?
BRI may be more accurate than a BMI in assessing shape and fat distribution. The Body Roundness Index takes into account waist circumference, which BMI Calculators don't consider.
2. Differences between BRI and BMI:
- BRI considers waist circumference, a key indicator of fat distribution
- More sensitive to changes in body shape and fat distribution
- Potentially better at predicting cardiovascular health risks
- Provides a more accurate assessment for people with high muscle mass
3. How to measure waist for the BRI Calculator?
In order to get accurate results with our BRI Calculator, measure your waist circumference at the midpoint between the lower margin of the last palpable rib and the top of the iliac crest, usually around the navel level. This measurement is crucial for an accurate Body Roundness Index calculation.
References for Body Roundness Index Calculator (BRI)
- Thomas, D. M., et al. (2013). Relationships between body roundness with body fat and visceral adipose tissue emerging from a new geometrical model. Obesity, 21(11), 2264-2271.
- Chang, Y., et al. (2018). Body roundness index and its association with metabolic syndrome in type 2 diabetes mellitus. Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy, 11, 827-833.
- Perona, J. S., et al. (2019). Waist circumference and abdominal volume index are the strongest anthropometric discriminators of metabolic syndrome in Spanish adolescents. European Journal of Clinical Investigation, 49(3), e13060.
- Rico-Martín, S., et al. (2020). Effectiveness of body roundness index in predicting metabolic syndrome: A systematic review and meta-analysis. Obesity Reviews, 21(9), e13023.