**The BMI (Body Mass Index) is undoubtedly a widespread health indicator.** The relevancy of the BMI as a good health indicator is a recurrent topic in the health and fitness industry. Many health professionals use BMI, but some experts say that it doesn’t provide an accurate picture. **But** **what does the result of your BMI tell you?** Is it accurate? **Can the BMI results be trusted?** We’ll explore these questions and more in this blog post!

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**What Is The BMI? What Does The BMI Tell Me?**

The **Body Mass Index (BMI)** is an approximate measure of your total body fat. The BMI tells whether you are – most likely – **underweight, well-built, or overweight**. The BMI indirectly tells you what your best weight for health is.

The BMI can also** define an ideal healthy weight or a weight reduction goal** in a diet program via a reverse BMI Calculator.

**What Is The BMI Formula?**

The **original BMI formula** is **weight in kilograms (kg) divided by height in meters squared (m)²** as follow:

**Metric-System BMI formula: BMI = Weight (kg) / Height (m)²**

As a BMI formula example, a 60kg 165cm person has a BMI of 60/(1.65)^2=22.

Please note that the original Metric-System BMI formula uses meters and not cm when taking into account height. With the Imperial system, the original BMI formula is adjusted by a factor for weight and tall conversion purposes.

**Imperial-System BMI formula: BMI = 703 * Weight (lbs) / Height (inches)²**

As a BMI formula example using the imperial system, a 134lbs 64inch person has a BMI of 703 * 134 / 64² = 23.

**Do Doctors Still Use Bmi?**

**Yes, they do.** Doctors use BMI to **assess a patient’s risk for obesity-related diseases and conditions, such as diabete**s. Medical professionals know that the Body Mass Index must be interpreted within an adjusted BMI benchmark for some ethnicities to yield good insight into an individual’s health. **Further adjustments are also required when the individual is very short or very tall or has an above-average proportion of muscle bulk.**

Still, some people fail to do so and draw the wrong conclusion from the BMI result. A a result, the metric has been questioned due to its lack of accuracy in some cases.

**Can The BMI Be Trusted?**

**Yes,** the BMI is a trustworthy health indicator **as long as the BMI result is interpreted correctly and adjusted for context.** To draw the correct conclusion from a BMI calculation, it is essential to compare the BMI result with an ethnicity-adjusted BMI benchmark. For example, a BMI of 18 would be considered unhealthy in many situations, but it is a perfectly normal BMI for an Asian woman.

**How Accurate Is The Bmi Calculator?**

**The correct interpretation of the BMI result is the key to making the BMI a good health indicator. The accuracy of the BMI result is as good as its input data accuracy, weight, and height. **This live BMI calculator uses the Body Mass Index formula straightforwardly to get your BMI result. However, the interpretation of your BMI result is subject to variation.

**Is The Bmi A Good Health Indicator?**

There has been **much debate about the trustworthiness of BMI as an indicator for overall fitness or even weight.** The truth is that the BMI calculation itself (i.e., the BMI value given by the BMI formula) is not directly a good health indicator if interpreted straightforwardly.

Still, a** correct interpretation of the BMI value adjusted for context (Height, ethnicity, muscle mass..) makes the BMI a good health indicator worth tracking.**

For instance, the context of the **athletic lifestyle of the individual must be factored in**. For example, the video below gives the example of Marshawn Lynch, a running back football player whose weight is 98kg and height is 1.8m. His BMI result is 30. A BMI of 30 would indicate that this individual is obese if interpreted out of context. It couldn’t be further from the truth.

Another example is that the **BMI result interpretation must be adjusted for ethnicity**, particularly when the BMI is calculated for Asian people. Find out what is the Asian healthy BMI here. Finally, **women with more significant than average breasts** must keep in mind that their breast size will **increase the BMI value**; see how breast size impacts the BMI result.

**What BMI doesn’t Tell You About Your Health?**

**The BMI value must be adjusted for context (Height, ethnicity, muscles mass..). **Indeed, the BMI may penalize you for instance, if you have a lot of muscles as your weight will climb, but not your height. The video below explains what the BMI doesn’t tell: