Calculate Body Mass Index

Your BMI (Body Mass Index) is a calculation used to determine whether or not a person is overweight that applies to both adult men and women. Although BMI is not perfect because it does not directly assess body fat, it is still considered a reasonable alternative for identifying people who are overweight or obese because directly measuring body fat is an expensive process.
It is beneficial to understand your BMI and what it means in order to achieve and maintain a healthy weight.

BMI formula

The BMI formula combines your weight (in kilograms or pounds) and height (in meters or inches) to create a simple calculation that provides a measure of your body fat.

The BMI formula is: BMI = Kg / (m)2.

Here are the standard BMI ranges

  • 1 inch = 2.54 centimeters
  • 1 meter = 100 cm
  • 1 pound = kilogram

bmi calculator

BMI formula

The body mass index formula is easy to determine. It’s a simple calculation that takes into account your weight and height.

  • The imperial BMI formula = Weight (LBS) x 703 ÷ Height (Inches²)
  • The metric BMI formula = Weight (KG) ÷ Height (Metres²)

This calculator computes the body mass index and rates it appropriately for men and women.

Children’s BMI:

For children and young people aged 2 to 18, the BMI calculator takes into account age and gender as well as height and weight.

Ideal Body Weight Calculator

There are several ways you can determine your ideal weight. The most common methods are:

  • Body Mass Index (Weight and Height)
  • Waist-to-Hip Ratio (WHR)
  • Body Fat Percentage

BMI < 18.5: Below normal weight
BMI >= 18.5 and < 25: Normal weight
BMI >= 25 and < 30: Overweight
BMI >= 35 and < 40: Class II Obesity
BMI >= 40: Class III Obesity

Waist-to-Hip Ratio (WHR)

This measurement checks how much fat is stored around your hips, waist, and buttocks. It basically compares your hip circumference with your actual waist size.