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Body Mass Index (BMI) Calculator

The Body Mass Index (BMI) is a common measurement, providing a ratio of weight in relation to height. BMI can be expressed as a mathematical formula in which your body weight (in kilograms) is divided by the square of your height (in meters).

Your BMI is

Body Mass Index

Weight (kg) / Height (m2)

  • You must choose centimetres/kg or inches/lb
  • You must enter your height
  • Invalid height entered
  • You must enter your weight
  • Invalid weight entered

BMI Results

  • < 20 May be associated with health or nutritional problems in some individuals
  • 20 - 25 Healthy BMI for most adults
  • 25 -27 May be at risk of health problems and diseases in some individuals
  • > 27 Increased risk of health problems and diseases

BMI is useful for establishing guidelines of health related risks for healthy adults between the age of 20 and 65 years old. It does not apply to infants, children, adolescents, pregnant women, breastfeeding mothers, and seniors over the age of 65.

BMI is not recommended to be the only diagnostic tool or measurement for body composition and fitness. Other factors must be considered in order to determine if a certain BMI is associated with an increased risk for health or nutritional problems.