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BMI Calculator

Body mass index (BMI) is a measure of your body weight per unit of height (calculated by dividing your weight in kilograms by your height in meters squared). BMI is often used by doctors, personal trainers, and other healthcare professionals to determine if someone is over, under, or average weight. Although not as accurate or useful to know as your body fat percentage, body mass index gives you a general idea of whether or not you should lose weight.

Body mass index (BMI) is a measure of your body weight per unit of height (calculated by dividing your weight in kilograms by your height in meters squared). BMI is often used by doctors, personal trainers, and other healthcare professionals to determine if someone is over, under, or average weight. Although not as accurate or useful to know as your body fat percentage, body mass index gives you a general idea of whether or not you should lose weight.

Frequently Asked Questions

Are BMI charts accurate?

Sort of.

BMI charts often underestimate how much fat people are carrying if they don’t have much muscle mass (they don’t lift weights), and this is particularly true among people with lots of excess body fat.

That said, BMI charts are usually accurate in determining if someone is obese or not (that is, if a BMI chart says someone is obese, there’s a 95% chance that they are actually obese).

Are BMI charts accurate for women?

Yes.

Although women carry more essential body fat than men, it’s not a big enough difference to affect your BMI.

Are BMI charts accurate for “big-boned” people?

Yes.

Although some people do have thicker, denser bones than others (thanks to resistance training and genetics), the differences are too small to meaningfully impact your BMI.

Are BMI charts accurate for muscular people?

Sort of.

BMI charts will often classify muscular, lean people as “overweight,” because BMI charts only account for total body weight and not body composition. Thus, if you know you’re fairly lean (less than 15% body fat for men and 25% for women), don’t worry if you’re “overweight” according to a BMI chart—research shows this isn’t unhealthy.

That said, if a BMI chart classifies someone as “obese,” there’s virutally no chance this is due to naturally high levels of muscle mass. Either the person is carrying more body fat than they realize or they’re taking steroids.

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If you don't absolutely love our stuff for whatever reason, you get a prompt and courteous refund. No forms to fill out or hoops to jump through.

That means you can say "yes" now and decide later. You really have nothing to lose.

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Many companies use shipping and handling fees to increase their profit margins, but here at Legion, we hate profits so our shipping is 100% free!

Okay, we do dig on profits, but we also go in for happy customers, and free shipping works like gangbusters.

So, if you live in the United States, your order ships free regardless of order size, and if you live anywhere else, your order ships free when it’s over $199.

Why the restriction on international orders? Unfortunately, shipping abroad is very expensive, and if we didn’t require a minimum order size, we’d lose a lot of money.

That said, as most international customers spend about $200 with us each time they shop, this setup is a win-win.

And no matter what you decide to buy, you’re always protected by our ironclad, 100% money-back guarantee that works like this:

If you don’t absolutely love our stuff for whatever reason, you get a prompt and courteous refund. No forms to fill out or hoops to jump through.

That means you can say “yes” now and decide later. You really have nothing to lose.

Clinically Effective Doses

Great ingredients aren't enough to make a great product—you also need correct doses.

That’s why we use the exact doses of every ingredient that have safely produced the desired benefits in peer-reviewed studies.

Made in USA

Where your supplements are made matters, because rules and regulations regarding quality and purity differ from country to country.

And if you want to ensure the supplements you’re swallowing every day are safe and effective, you want products produced in the USA.

That’s why all of our supplements are made in America in NSF-certified and FDA-inspected facilities that operate in accordance with the Current Good Manufacturing Practice (cGMP) regulations.

We pay a premium to work with the best manufacturers in the country, but it’s the only way we can also produce the best all-natural sports supplements.

Lab Tested

Did you know that studies have shown that many supplements contain dangerously high levels of toxins like lead, arsenic, and cadmium?

Not ours.

Every ingredient of every supplement we produce is tested for heavy metals, microbes, allergens, and other contaminants to ensure they meet the strict purity standards set by the FDA.

Naturally Sweetened & Flavored

While artificial sweeteners may not be as dangerous as some people claim, studies suggest that regular consumption of these chemicals may indeed be harmful to our health and that more research is needed.

That’s why all of our supplements are naturally sweetened and flavored and contain no artificial food dyes, fillers, or other unnecessary junk.

Science-Backed Ingredients & Doses

Unlike some supplement companies, we don’t sell dubious white labeled or off-the-shelf formulations.

Instead, our custom and unique formulations are the result of extensive reviews of the scientific literature to discover the most effective ingredients for each.

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Meal Plan Waiver

In consideration of being allowed to participate in the activities and programs offered by Legion Athletics, Inc. and to use its nutrition programs and supplement and training advice, in addition to the payment of any fee or charge, I do hereby waive, release and forever discharge and hold harmless Legion Athletics, Inc. and its consultants, officers, agents, and employees from any and all responsibility, liability, cost and expenses, including injuries or damages, resulting from my participation in any activities, or my use of any programs designed by Legion Athletics, Inc. I do also hereby release Legion Athletics, Inc. its consultants, officers, agents and employees from any responsibility or liability for any injury, damage or disorder (physical, metabolic, or otherwise) to myself, or in any way arising out of or connected with my participation in any activities with Legion Athletics, Inc.

I understand that Legion Athletics, Inc. and its consultants, officers, agents, and employees are not healthcare professionals. The services I have received from Legion Athletics, Inc do not provide or offer and are not a replacement for professional medical evaluation, advice, diagnosis, or treatment (“medical advice”). While Legion Athletics, Inc. believes that the information provided through our services and the site is current and reliable, Legion Athletics, Inc. cannot and does not make any such guarantee or warranty.

I hereby agree that before using our services, you will consult your physician or other health care provider for medical advice, particularly if you are at risk for problems arising from changes in your diet or lifestyle. The services provided by Legion Athletics, Inc. are not intended to be used by minors or individuals with health conditions that makes the kind of changes to diet or lifestyle suggested by our services unsafe or inappropriate. Furthermore, I hereby understand that Legion Athletics, Inc. shall have no obligation or responsibility to monitor my health status or health condition or to contact or alert any medical or emergency professional.

I understand and am aware that strength, flexibility, and aerobic exercise, including the use of equipment are a potentially hazardous activity. I also understand that fitness activities involve a risk of injury and even death, and that I am voluntarily participating in these activities and using equipment and machinery with knowledge of the dangers involved. I hereby agree to expressly assume and accept any and all risks of injury or death related to said fitness activities. In addition, I certify that I am 18 years of age or older.

I do hereby further declare myself to be physically sound and suffering from no condition, impairment, disease, infirmity or other illness that would affect nutrient metabolism or prevent my participation or use of equipment or machinery except as hereinafter stated. I do hereby acknowledge that Legion Athletics, Inc. has recommended to me that I obtain a physician’s approval for my participation in an exercise/fitness activity or in the use of exercise equipment and machinery. I also acknowledge that Legion Athletics, Inc. has recommended that I have a yearly or more frequent physical examination and consultation with my physician as to physical activity, exercise and use of exercise and training equipment so that I might have his/her recommendations concerning these fitness activities and equipment use. I acknowledge that I have either had a physical examination and been given my physician’s permission to participate, or that I have decided to participate in activity and use of equipment, machinery, and programs designed by Legion Athletics, Inc. without the approval of my physician and do hereby assume all responsibility for my participation and activities, and utilization of equipment and machinery in my activities.

I understand that all diet and training programs, nutrition and supplementation advice, and any and all other forms of information obtained from Legion Athletics, Inc. are not meant to treat or manage any health condition. I understand the need to consult with a healthcare provider prior to adjusting current lifestyle or eating habits or beginning any new diet and/or training plan.

In addition, I hereby represent and warrant that I am currently covered by an accident and health insurance policy. With my purchase of products or services from Legion Athletics, Inc., I understand that results of any sort are not guaranteed and agree not to hold Legion Athletics, Inc. staff liable for any outcomes or a lack thereof. With my purchase of any Legion Athletics, Inc. products or services, I understand that they are only guaranteed to work in software designed for a PC computer such as Microsoft Excel. I understand that I am purchasing having known that beforehand and understand that using any other application besides Microsoft Excel might result in the products not working with 100% functionality.

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Our scientific review board of nutritionists, dietitians, molecular biologists, doctors, and other accredited experts is responsible for reviewing every article, podcast, and video we produce to ensure they’re evidence based, accurate, trustworthy, and current.

Thanks to their connections, credentials, and academic experience, this team of MDs, PhDs, and other professionals has access to a wealth of research published in the largest and most prestigious journals in the world.

This allows them to not only review individual studies but also analyze the overall weight of the evidence on any and all topics related to diet, exercise, supplementation, and more.

If you feel that any of our content is inaccurate, misleading, out-of-date, or anything less than factual, please let us know in the comments section of the article in question.

Evidence Based

We follow a detailed, rigorous, multi-step process to create content that meets the highest standards of clarity, practicality, and scientific integrity.

First, our research associates provide our editorial team with accurate, up-to-date, proven scientific evidence.

Then, our editorial team uses this research to draft articles and outlines for podcasts and videos.

Finally, our scientific review board reviews the content to ensure all key information and claims are backed by high-quality scientific research and explained simply and precisely.

If you feel that any of our content is inaccurate, misleading, out-of-date, or anything less than factual, please let us know in the comments section of the article in question.