BMI Instructions:

1-Input your height in inches

  • 1ft = 12 in.

To calculate 5ft:

  • 12in. x 5ft = 60″

To calculate 5′ 8″:

  • 5 x 12 = 60 + 8 inches = 68″

2- Input your weight in pounds

3- Choose use metric “No”

If you prefer to input your weight in kilograms and height in centimeters, you can choose “Yes” for Metric System.

What is the BMI?

Body Mass Index (BMI) is a number calculated from a person's weight and height. BMI provides a reliable indicator of body fatness for most people and is used to screen for weight categories that may lead to health problems.

Calculating Your BMI

You can calculate your BMI with this formula: weight (in pounds) / [height (in inches) x height (in inches)] x 703 or use the Academy BMI calculator.

The Centers for Disease Control and Prevention uses BMI to define terms like overweight and obese:

  • Underweight: BMI below 18.5
  • Normal weight: 18.5 to 24.9
  • Overweight: 25.0 to 29.9
  • Obese: 30.0 and above.
  • Extrem (Morbid) Obesity: 40 or above.

While BMI calculations for children and teens use the same formula as adults, criteria used to define obesity and overweight are different for young people because of factors like body fat differences between boys and girls and variations in body fat at different ages. Visit the BMI Percentile Calculator for Child and Teen to determine your child's BMI.

Waist to Hip Ratio

Waist-to-hip ratio looks at the proportion of fat stored on your body around your waist and hip. To calculate your waist to hip ratio input your measurements.

  • Women with waist-to-hip ratios of more than 0.8 are at increased health risk because of their fat distribution.

  • Men with waist-to-hip ratios of more than 1.0 are at increased health risk because of their fat distribution

*Information by the Academy of Nutrition and Dietetics.