Calculate BMI online

The Body Mass Index (BMI) Calculator can be used to calculate BMI values based on a persons height and weight. Calculate you BMI online. BMI is a fairly reliable indicator of body fatness. Enter your weight and height below to calculate your BMI. Looking for a BMI-slider?

BMI calculator – kg and cm

BMI calculator – lbs and inches

BMI Ranges

  • < 16.0 Severely Underweight
  • 16.0 – 18.4 Underweight
  • 18.5 – 24.9 Normal
  • 25.0 – 29.9 Overweight
  • 30.0 – 34.9 Moderately Obese
  • 35.0 – 39.9 Severely Obese
  • > 40.0 Morbidly Obese

Formula for calculating BMI:

Metric units: BMI = weight (kg) ÷ height2 (m)
US units: BMI = (weight (lb) ÷ height2 (in)) * 703

More information about BMI, and how it works, can be found here.