Body Mass Index (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. 

WHAT SHOULD YOUR BMI BE FOR YOUR AGE?

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.

HOW DO WE CALCULATE YOUR BMI?

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.

IS BMI ACCURATE?

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.

WHAT IS THE PROBLEM WITH THE BMI CALCULATOR?

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

Calories Calculator

Training to lose weight or body fat? Our Calories Calculator estimates how many calories you need each day. Less uncertainty, more clarity.

Protein Calculator

Based on scientific research and the data you enter, we our Protein Intake Calculator calculates your optimal daily protein intake.

Aerobic Capacity Calculator

Aerobic Capacity Calculator, or Vo2 Max Calculator, is intended for every type of athlete who wants to know their maximal aerobic capacity.