The BMI calculator is a helpful tool that measures whether you are overweight, underweight, or just right. Your weight alone is inadequate to tell, as a high, slim guy might quickly weigh more than a short however rotund lady. The body mass index, or BMI, overcomes this issue by discovering a ratio of your weight to your height, and returning a single number. This number will fit into a classification on the scale of BMI ranges, which are defined as underweight, normal, overweight, and obese.

To exercise your body mass index by yourself, and what the number suggests for you, you'll require to know:

- How to compute BMI.
- What is normal BMI.
- What the numerous BMI ranges are.

**How to determine BMI**

Initially, let's cover the computation:

- Divide your weight (in kilograms) by your height (in meters).
- Divide the response by your height once again to get your BMI.

So the body mass index formula is as follows:

BMI = weight/ height ².

**Normal BMI**

Our BMI calculator makes it a breeze for you to discover your number. However, please remember that BMI is a rough evaluation. The outcome can be somewhat deceiving for people who are well muscled (such as body builders), or for those who have actually lost a significant quantity of muscle (such as the elderly).

If you are unsure whether you fall within the "normal" range of muscle mass, please consider using one of our more customized calculators. The body fat calculator can zero-in on your percentage of body fat, while our lean body mass calculator can tell you how much you would weigh without any fat.

**BMI ranges**

There are five standard ranges within the BMI scale:

- Underweight = less than 18.5
- Normal weight = 18.5 - 24.9
- Overweight = 25 - 29.9
- Obesity = 30 - 35
- Extreme obesity = 35 and more

The BMI Prime is an awesome adjustment to our own BMI calculator. It's a decimal number where 1.0 = the upper limit to the "normal BMI" range. It's an incredibly simple method to see if you're overweight or not. If your BMI Prime is more than 1, then you've got some weight to lose.