BRI Calculator Body Roundness Index

Our free BRI calculator helps females and males get a more accurate health check! By including belly fat, assessing heart risk, and being ideal for those with muscle, our online BRI calculator offers a better alternative to BMI.

Curious? Enter your details and discover your Body Roundness Index now.

Measurement Unit

Length

Waist size

Optional for more results:

Hip size

Weight

Gender

Age

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Average BRI Results Through This Website

Average BRI in total: 4.04 (Lean to average body shape)
Average BRI for women: 3.81 (Lean to average body shape)
Average BRI for men: 4.26 (Lean to average body shape)

View average BRI results per country

How to Use the BRI Calculator

Pick a measurement unit and enter your height and waist circumference.
Optional: fill in your hip circumference, weight, gender, and age to see extra results like your waist-to-hip ratio (WHR), BMI, body fat percentage, visceral fat mass, and fat tissue (VAT).
Click "Calculate my BRI" to see your BRI result.

How Do I Measure My Waist?

It's best to measure in the morning, before breakfast, in light clothing or without a shirt for a consistent measurement

Measuring waist size for a man and woman

Stand up straight with your feet together and breathe out gently.
Find your natural waist: it’s the narrowest part of your torso, between your ribs and hips.
Wrap a measuring tape around your waist horizontally. No measuring tape? Use a string, mark where the ends meet, and measure the length with a ruler.
Measure your waist after a gentle exhale, without sucking in or pushing out your belly.

Calculate your BRI

Why BRI Might Be More Reliable Than BMI

BRI takes waist circumference into account, which is a key indicator of belly fat.
It responds better to variations in body shape and fat distribution.
It might be more suitable for predicting heart disease risks.
It provides a more accurate picture for people with a lot of muscle mass.

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Average BRI Results per Country

Discover how BRI and body shapes differ across countries for both men and women. This table is based on anonymous user data and shows the average Body Roundness Index (BRI) for each country and gender from people who have submitted the BRI form on our website.

Country	Average BRI	BRI women	BRI men
Thailand	2.17 Very lean body shape	1.11 Very lean body shape	3.11 Very lean body shape
Qatar	2.61 Very lean body shape	1.65 Very lean body shape	5.46 Above average body roundness
Taiwan	2.80 Very lean body shape	2.28 Very lean body shape	3.01 Very lean body shape
Singapore	2.82 Very lean body shape	2.80 Very lean body shape	2.98 Very lean body shape
United Arab Emirates	2.89 Very lean body shape	3.28 Very lean body shape	1.69 Very lean body shape
Hong Kong SAR China	2.89 Very lean body shape	4.24 Lean to average body shape	2.45 Very lean body shape
Malaysia	3.08 Very lean body shape	2.78 Very lean body shape	3.21 Very lean body shape
Japan	3.12 Very lean body shape	2.84 Very lean body shape	3.29 Very lean body shape
China	3.14 Very lean body shape	1.89 Very lean body shape	3.19 Very lean body shape
Bolivia	3.21 Very lean body shape	2.39 Very lean body shape	3.48 Lean to average body shape
North Macedonia	3.23 Very lean body shape	2.83 Very lean body shape	3.67 Lean to average body shape
Vietnam	3.30 Very lean body shape	3.68 Lean to average body shape	3.76 Lean to average body shape
Honduras	3.36 Very lean body shape	3.13 Very lean body shape	3.48 Lean to average body shape
Nepal	3.37 Very lean body shape	2.67 Very lean body shape	3.46 Lean to average body shape
Dominican Republic	3.39 Very lean body shape	2.31 Very lean body shape	4.39 Lean to average body shape
Costa Rica	3.44 Lean to average body shape	3.33 Very lean body shape	4.53 Average body shape
South Korea	3.47 Lean to average body shape	3.30 Very lean body shape	3.56 Lean to average body shape
Norway	3.47 Lean to average body shape	3.44 Lean to average body shape	3.28 Very lean body shape
Albania	3.51 Lean to average body shape	2.67 Very lean body shape	4.34 Lean to average body shape
Bulgaria	3.51 Lean to average body shape	4.05 Lean to average body shape	2.29 Very lean body shape
Bosnia & Herzegovina	3.57 Lean to average body shape	3.29 Very lean body shape	3.51 Lean to average body shape
Poland	3.61 Lean to average body shape	3.35 Very lean body shape	3.96 Lean to average body shape
Denmark	3.61 Lean to average body shape	3.39 Very lean body shape	4.01 Lean to average body shape
Slovenia	3.63 Lean to average body shape	4.42 Lean to average body shape	3.03 Very lean body shape
Netherlands	3.70 Lean to average body shape	3.43 Lean to average body shape	3.88 Lean to average body shape
Luxembourg	3.74 Lean to average body shape	3.92 Lean to average body shape	3.64 Lean to average body shape
United States	3.77 Lean to average body shape	3.70 Lean to average body shape	3.77 Lean to average body shape
Croatia	3.78 Lean to average body shape	3.95 Lean to average body shape	4.07 Lean to average body shape
Brazil	3.80 Lean to average body shape	3.46 Lean to average body shape	4.23 Lean to average body shape
Canada	3.83 Lean to average body shape	4.07 Lean to average body shape	3.65 Lean to average body shape
Åland Islands	3.89 Lean to average body shape	4.08 Lean to average body shape	3.59 Lean to average body shape
Czechia	3.89 Lean to average body shape	3.69 Lean to average body shape	4.41 Lean to average body shape
Austria	3.91 Lean to average body shape	3.64 Lean to average body shape	4.12 Lean to average body shape
Uruguay	3.93 Lean to average body shape	3.10 Very lean body shape	4.54 Average body shape
Australia	3.94 Lean to average body shape	3.62 Lean to average body shape	4.13 Lean to average body shape
Turkey	3.94 Lean to average body shape	3.27 Very lean body shape	4.89 Average body shape
Belgium	3.95 Lean to average body shape	3.58 Lean to average body shape	4.25 Lean to average body shape
Mexico	3.97 Lean to average body shape	3.72 Lean to average body shape	4.47 Average body shape
Spain	4.00 Lean to average body shape	3.73 Lean to average body shape	4.21 Lean to average body shape
Switzerland	4.01 Lean to average body shape	3.61 Lean to average body shape	4.37 Lean to average body shape
Germany	4.01 Lean to average body shape	3.78 Lean to average body shape	4.27 Lean to average body shape
Romania	4.03 Lean to average body shape	3.38 Very lean body shape	5.93 Above average body roundness
Ecuador	4.03 Lean to average body shape	2.49 Very lean body shape	4.18 Lean to average body shape
France	4.06 Lean to average body shape	3.73 Lean to average body shape	4.86 Average body shape
Italy	4.08 Lean to average body shape	3.65 Lean to average body shape	4.21 Lean to average body shape
Sweden	4.09 Lean to average body shape	3.85 Lean to average body shape	4.59 Average body shape
Portugal	4.14 Lean to average body shape	3.14 Very lean body shape	5.48 Above average body roundness
Turkmenistan	4.17 Lean to average body shape	3.71 Lean to average body shape	4.62 Average body shape
Hungary	4.17 Lean to average body shape	3.90 Lean to average body shape	4.67 Average body shape
Finland	4.19 Lean to average body shape	4.03 Lean to average body shape	4.34 Lean to average body shape
United Kingdom	4.26 Lean to average body shape	3.72 Lean to average body shape	3.56 Lean to average body shape
Greece	4.26 Lean to average body shape	4.79 Average body shape	4.23 Lean to average body shape
South Africa	4.28 Lean to average body shape	4.62 Average body shape	2.95 Very lean body shape
Colombia	4.28 Lean to average body shape	3.68 Lean to average body shape	4.66 Average body shape
Slovakia	4.35 Lean to average body shape	3.89 Lean to average body shape	4.59 Average body shape
Mauritius	4.37 Lean to average body shape	5.03 Average body shape	3.70 Lean to average body shape
Venezuela	4.39 Lean to average body shape	3.25 Very lean body shape	4.82 Average body shape
Chile	4.39 Lean to average body shape	3.35 Very lean body shape	5.09 Average body shape
Cyprus	4.41 Lean to average body shape	4.33 Lean to average body shape	4.52 Average body shape
Iran	4.41 Lean to average body shape	3.30 Very lean body shape	4.61 Average body shape
Guatemala	4.43 Lean to average body shape	3.96 Lean to average body shape	4.44 Lean to average body shape
Israel	4.47 Average body shape	4.30 Lean to average body shape	4.26 Lean to average body shape
Uzbekistan	4.48 Average body shape	5.93 Above average body roundness	3.43 Lean to average body shape
Peru	4.49 Average body shape	4.67 Average body shape	3.99 Lean to average body shape
Russia	4.53 Average body shape	4.24 Lean to average body shape	4.85 Average body shape
Indonesia	4.55 Average body shape	5.40 Average body shape	4.55 Average body shape
Kazakhstan	4.59 Average body shape	4.83 Average body shape	4.57 Average body shape
Ukraine	4.60 Average body shape	4.48 Average body shape	4.85 Average body shape
Belarus	4.62 Average body shape	4.39 Lean to average body shape	4.70 Average body shape
Iceland	4.72 Average body shape	2.85 Very lean body shape	3.51 Lean to average body shape
Lithuania	4.77 Average body shape	3.14 Very lean body shape	6.39 Above average body roundness
Argentina	4.78 Average body shape	4.23 Lean to average body shape	5.01 Average body shape
India	4.85 Average body shape	10.76 High body roundness	2.41 Very lean body shape
Ireland	4.87 Average body shape	3.77 Lean to average body shape	7.33 High body roundness
Morocco	5.60 Above average body roundness	2.71 Very lean body shape	1.01 Very lean body shape
Paraguay	5.93 Above average body roundness	4.70 Average body shape	7.41 High body roundness

Calculate your BRI

BRI calculation using a woman’s waist measurement

Understanding Your BRI Results

Our free BRI calculator gives you a BRI value and an explanation based on recent studies:

BRI under 3.41: Very slim body shape (lowest 20% of the population). This indicates a relatively narrow waist and a very slim build.
BRI between 3.41 and 4.45: Slim to average body shape (lower 20-40% of the population). This suggests your body shape is slim to average, with a waist circumference smaller than most people’s.
BRI between 4.45 and 5.46: Average body shape (middle 40-60% of the population). This indicates an average build, with no significant slimness or roundness.
BRI between 5.46 and 6.91: Above average body roundness (upper 60-80% of the population). This means you have an above average body shape, with a larger waist circumference than most people.
BRI of 6.91 or higher: High body roundness (top 20% of the population). This suggests a high body roundness shape, which might come with an increased health risk.

Keep in mind that BRI only measures one aspect of your health. For a complete picture, it’s smart to check in with a doctor. They can consider other factors like nutrition, physical activity, genetics, and overall health in their assessment.

Average BRI by Gender and Age

This is based on the study "Body Roundness Index and Mortality Among Adults in the U.S." (Zhang et al.), which looked at the link between body shape, fat distribution, and health risks across different age and gender groups in the American population.

Average BRI Data Bar Chart by Age and Gender

Women

Men

Average BRI for Women

Age Group	Average BRI	BRI Range
18-29 years	2.61	1.72 - 3.50
30-39 years	3.13	2.01 - 4.25
40-49 years	3.67	2.37 - 4.97
50-59 years	4.25	2.85 - 5.65
60-69 years	4.61	3.15 - 6.07
70+ years	4.71	3.20 - 6.22

Average BRI for Men

Age Group	Average BRI	BRI Range
18-29 years	2.91	1.93 - 3.89
30-39 years	3.54	2.42 - 4.66
40-49 years	3.92	2.74 - 5.10
50-59 years	4.21	2.98 - 5.44
60-69 years	4.35	3.10 - 5.60
70+ years	4.31	3.04 - 5.58

These averages give you a handy way to compare your BRI with others in the same age and gender group. But keep in mind that health is influenced by a lot of factors, so these numbers should really just be seen as a rough guideline.

Calculate your BRI

Frequently Asked Questions

What is the Body Roundness Index (BRI)?

The Body Roundness Index (BRI) is a measure that assesses body shape and fat distribution by taking into account height, weight, and waist circumference. It is considered a more accurate indicator of health risks compared to the traditional Body Mass Index (BMI).

How is BRI calculated?

BRI is calculated using a mathematical formula that utilizes both waist circumference and height. This allows for an estimation of a person's body fat percentage and body shape.

Why is waist circumference important for measuring health?

Waist circumference is a significant indicator of abdominal fat, which is associated with an increased risk of chronic diseases such as cardiovascular diseases, type 2 diabetes, and metabolic syndrome. Measuring waist circumference provides a better understanding of fat distribution than just weight or BMI alone.

How often should I measure my BRI?

It is recommended to measure your BRI periodically, for example, every 3-6 months, especially if you are making lifestyle changes such as starting a new diet or exercise program. This helps you monitor your progress and make adjustments as needed.

What is a healthy BRI value?

A healthy BRI value varies depending on age and gender. Generally, BRI values between 4 and 5 are considered average, while values above 6 indicate increased body roundness and possibly higher health risks.

What is a Healthy BRI by Age?

How accurate is BRI compared to other methods?

BRI is more accurate in assessing abdominal fat and body shape than BMI, as it considers waist circumference. However, other methods, such as DEXA scans, can be even more accurate but are often less accessible and more expensive.

Is BRI suitable for all ages?

While BRI can be useful for adults, it is not always suitable for children and teenagers, as their bodies change during growth. Specific guidelines and methods are needed to assess health and body fat for these groups.

How does BRI relate to health risks?

A higher BRI can indicate more abdominal fat, which is often associated with an increased risk of conditions such as type 2 diabetes, cardiovascular diseases, and high blood pressure. It is therefore a useful indicator for assessing these risks.

Can BRI predict health problems?

Although BRI is not a diagnostic tool, it can help identify increased risks for health problems such as cardiovascular diseases and type 2 diabetes. It is a useful tool for early detection of potential risks.

Why should I use BRI instead of BMI?

You might want to use BRI instead of BMI if you want a better understanding of your body shape and fat distribution, especially if you have a high muscle mass, as BMI does not account for these factors.

How can I improve my BRI?

You can improve your BRI through regular exercise, a healthy diet, and reducing abdominal fat. This not only improves your BRI value but also lowers health risks. Strength training can help maintain muscle mass, which is important for maintaining a healthy body fat percentage. Additionally, avoiding high-sugar and high-carb foods can help reduce abdominal fat, directly impacting your BRI.

Can I lower my BRI directly by losing weight?

Yes, losing weight can directly lower your BRI, especially if the weight loss comes primarily from abdominal fat. Reducing your waist circumference has a greater impact on your BRI than just losing body weight in general. It is important to focus on a combination of healthy eating, aerobic exercises, and strength training to effectively reduce both your weight and waist circumference. Changes in your BRI are likely to be more noticeable if you specifically lose abdominal fat.

Are there limitations to using BRI?

Yes, BRI does not account for muscle mass, bone density, and other factors that also play a role in health. People with high muscle mass may have a higher BRI without actually having a high body fat percentage.

How does muscle mass affect BRI value?

People with high muscle mass may have a higher BRI value without it indicating an unhealthy body fat percentage. BRI primarily measures abdominal fat and body roundness but cannot differentiate between muscle mass and fat mass.

Is BRI suitable for athletes and bodybuilders?

For athletes and bodybuilders, BRI can be misleading as it does not differentiate between muscle mass and fat mass. For this group, an alternative method such as body fat percentage calculation or a DEXA scan is more suitable.

Is BRI suitable for people with medical conditions?

For people with certain medical conditions, such as obesity, underweight, or certain hormonal disorders, BRI may not be the most suitable measure. In such cases, it is advisable to consult a doctor for a more comprehensive assessment.

Can pregnant women use BRI?

BRI is not suitable for pregnant women, as waist circumference changes significantly during pregnancy, making calculations inaccurate.

What role does genetics play in BRI?

Genetics can influence where and how much fat the body stores, which can affect your BRI value. Some people may naturally have a higher or lower BRI regardless of their diet or physical activity.

What is the difference between BRI and WHR (Waist-to-Hip Ratio)?

BRI assesses body shape based on waist circumference and height, while WHR measures the ratio between waist and hip circumference. Both methods can provide insights into fat distribution and health risks, but BRI offers a broader view of body shape.

Calculate your BRI

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