SwissKnifeCalculator Logo

BMI Calculator

What is BMI?

BMI (Body Mass Index) is a calculation using your weight and height to determine your health status. While age and sex don't affect the BMI value directly, they provide context for interpreting results.

BMI = Weight (kg) / [Height (m)]²

For example, if a person weighs 70 kg and is 1.75 meters tall, the calculation would be:

BMI = 70 / (1.75 × 1.75) = 22.86

The resulting value is interpreted using the following ranges:

  • Underweight: BMI < 18.5
  • Normal weight: BMI 18.5–24.9
  • Overweight: BMI 25.0–29.9
  • Obesity: BMI ≥ 30

    • Examples

    • If you weigh 70 kg and are 170 cm tall, your BMI is 24.22 (Normal weight).
    • If you weigh 95 kg and are 160 cm tall, your BMI is 37.11 (Obesity).