Adult BMI Calculator Healthy Weight, Nutrition, and Physical Activity

Dean Theriot is a Personal Trainer and the Owner of Timberline Fitness in Houston, Texas. With over 25 years of experience in the fitness industry, Dean specializes in personal, group, and sport-specific training. Dean combines resistance and cardiovascular training with pilates exercises for comprehensive workouts for his clients. His sport-specific training includes football, basketball, and baseball. The net number of calories your body needs to meet your weight goal. Bad eating habits will affect your health as well as your skin and make you look older than your biological age. In this link, you get the formula to calculate BMI on your fingers.

hiw to calculate bmi

Because of this, the standards have varied over the past few decades. Dietary Guidelines have defined overweight at a variety of levels ranging from a BMI of 24.9 to 27.1. In 1985 the National Institutes of Health consensus conference recommended that overweight BMI be set at a BMI of 27.8 for men and 27.3 for women. National Institutes of Health brought U.S. definitions in line with World Health Organization guidelines, lowering the normal/overweight cut-off from a BMI of 27.8 and 27.3 to a BMI of 25. This had the effect of redefining approximately 25 million Americans, previously healthy, to overweight. A BMI that is less than the 5th percentile is considered underweight and above the 95th percentile is considered obese.

Waist-to-height ratio

To calculate BMI, a person can use BMI calculators or review the charts below. If you wish to calculate your BMI manually rather than using the BMI calculator, I’ve included some simple instructions and formulae below. It’s important that if you use these, you ensure that your units are in the same unit system and the correct corresponding unit. If you have underweight, your healthcare provider will likely order certain blood tests and other tests to check your overall health and to see if you’re malnourished. If this applies to you, we need to convert your height into inches so we can use it in the equation.

  • In the 1990s the World Health Organization decided that a BMI of 25 to 30 should be considered overweight and a BMI over 30 is obese, the standards the NIH set.
  • For example, if you are 1.75 meters tall, then you would multiply 1.75 by 1.75 and get a result of approximately 3.06.
  • This BMI tool is intended for use by men and women of 18 years and over.
  • BMI provides an estimate of your body fat, which can influence your risk of developing diseases.

In US units, where weight is in pounds and height is in inches, divide weight by inches squared. The CDC and WHO use the BMI range charts below to evaluate the weight of adults aged 20 and over given his or her height. These ranges typically apply to North American and Eurpoean populations. Wikipedia lists alternative BMI ranges and categories for specific Asian populations. Cut-off points for specific international subpopulations may vary. Slide show which explains obesity causes and tips on how to lose weight.

Getting Down to It: What Your BMI Means

The waist-to-height ratio is another tool that might predict the risk of heart disease, diabetes, and overall mortality more effectively than BMI. For example, high-performance athletes tend to be very fit and have little body fat. They can have a high BMI because they have more muscle mass, but this does not mean they weigh too much for their height. It’s important to remember that body fatness isn’t the only determiner of overall health. BMI can also be calculated by dividing your weight in pounds by your height in inches squared, then multiplying the answer by 703.

  • Studies suggest that health risks begin to increase when a woman’s waist reaches 31.5 inches .
  • However, many taller people are not just “scaled up” short people but tend to have narrower frames in proportion to their height.
  • Find your weight along the top edge of the chart and trace a line down.
  • You will also receive a smart scale and the opportunity to earn a Fitbit® at no cost to you.

BMI is an estimate of body fat, but it is not an accurate way to determine specific body fat percentages. Evidence suggests that where body fat is located also matters. Those who carry weight around the middle—what’s called an “apple” body shape—have higher health risks than people with a “pear” shape (i.e., those who accumulate weight in the hips and thighs). A 2010 study that followed 11,000 subjects for up to eight years concluded that BMI is not a good measure for the risk of heart attack, stroke or death.

BMI formula for men and women

BMI calculation can play a significant role in observing weight development, and is today’s preferred method over other health indicators, such as size or weight. Such criticism stems from the fundamental question of whether or not a simple BMI value higher than 24 can immediately indicate potential medical problems. Rather, critics are wanting to focus more and more frequently on the complete composition of an individual’s weight. This is especially relevant for athletes, in which higher django for python developers weight resulting from increased muscle mass, and consequently a higher BMI, does not indicate health problems. Furthermore, even those individuals who have a higher body fat can vary from case to case. A study from the Medical Clinic of Munich’s Ludwig Maximilian University, for example, distinguished between belly fat and so-called lower body fat. While the latter is safe on thighs, buttocks or arms, fat around the abdomen can increase the risk of cardiovascular disease and stroke.

Genetics and other factors, such as smoking cigarettes, play a large role in the development of these conditions. We compare this value to the weight categories listed on the BMI table and find that she is overweight. Now we have the right measurements we can use them in the formula. For example, if your height is 5 feet 10 inches, multiply 5 by 12 (which gives 60″) and add them to the extra 10 inches (which gives 70″).

How is BMI used?

Verywell Health articles are reviewed by board-certified physicians and healthcare professionals. These medical reviewers confirm the content is thorough and accurate, reflecting the latest evidence-based research. Content is reviewed before publication and upon substantial updates.

hiw to calculate bmi

It’s important to keep in mind that the generic BMI chart above does not account for differences between men and women. It is also limited in evaluating bodyweight health in people of short stature, or those who have very high muscle mass. BMI is used as an indicator of the relative healthiness of a person. The Centers for Disease Control and the World Health Organization recognize that people who are overweight or underweight are at higher risk for certain health conditions. BMI also enables health professionals to discuss bodyweight objectively with their patients. This calculator estimates your percentage body fat, your body type and the amount of calories you have to burn to lose 1% of your body fat and it uses U.S Navy’s Hodgdon-Beckett formula.

BMI Chart for Adults

Being overweight can mean that you’re more likely to have elevated cholesterol levels, so keeping an eye on your BMI is one way you can help to maintain heart health. BMI, or body mass index, is a measurement generally used to gauge the healthiness of a person’s weight. Invented by a physician called Quetelet in the early 1900s, BMI is widely used as a rough indicator of body mass health. This graph shows the correlation between body mass index and body fat percentage for 8550 men in NCHS’ NHANES 1994 data. Data in the upper left and lower right quadrants suggest the limitations of BMI. This can partially explain the increase in the overweight diagnosis in the past 20 years, and the increase in sales of weight loss products during the same time. WHO also recommends lowering the normal/overweight threshold for southeast Asian body types to around BMI 23, and expects further revisions to emerge from clinical studies of different body types.

  • This is especially true when BMI is utilized to predict the risk of chronic diseases and many of the leading causes of death.
  • Including this widget on your application will allow people to calculate their BMI and see the corresponding weight category.
  • For example, people in higher weight categories are considered to be at greater risk for high blood pressure and high cholesterol.
  • Your healthcare provider might determine possible reasons for underweight and recommend support or treatment.

Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. BMI also rarely has a lower weight bracket, which could lead very underweight and elderly people to believe they are a safe weight. Once you have your BMI, read our guide to healthy BMI readings here to find out if you are in a healthy BMI range.