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BMI Calculator

Our BMI Calculator quickly calculates your BMI (Body Mass Index) and it can be used for men, women, and children. Simply enter your weight and height in the calculator below to find out your BMI score. 

According to the National Institutes of Health (NIH) a BMI of less than 18 usually means a person is underweight.

If your BMI is between 18 and 25, you’re usually in the healthy range. Overweight is usually 25 to 30. A BMI over 30 usually indicates obesity.

Our BMI Calculator uses the imperial BMI formula.

Here is the exact formula we use to calculate your metrics:

Weight (lbs) x 703 ÷ Height (inches²)

The Imperial BMI formula has been around for many years and we believe it is the best one.

The thing about measuring your body mass index is this:

There’s no ideal healthy body for every man or woman. That’s why it’s best to regularly calculate and stay on top of all of your numbers. BMI is just one.

If you’re very tall or muscular, BMI is not great for you. You may find our Calories Calculator and Vo2 Max Calculator more helpful.

Doctors and other medical professionals often use BMI because it’s a quick and easy calculation. Our BMI Calculator makes it even quicker and easier.

The problem? While it does take into account your height, unlike just weighing yourself on a scale, it does not calculate the following:

  • body fat percentage distribution
  • muscle mass distribution
  • waist-to-hip ratios