BMI Calculator

Weight
Height
16 18.5 25 30 35 40
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Information

What is BMI?

Body Mass Index (BMI) is a simple measure that uses your height and weight to work out if your weight is healthy. The BMI calculation divides an adult's weight in kilograms by their height in metres squared.

BMI Categories:

  • Underweight = < 18.5
  • Normal weight = 18.5–24.9
  • Overweight = 25–29.9
  • Obesity = BMI of 30 or greater

The BMI formula is:

BMI = weight (kg) / (height (m))²

BMI Prime is a modification of the BMI system that shows your BMI as a decimal number relative to the upper limit of the normal BMI range (25). A BMI Prime of 1.0 means you are at the upper limit of normal weight. Above 1.0 means overweight.

BMI Calculator