Body Mass Index (BMI) is a quick, non-invasive measure of body fat based on weight and height. It’s widely used by health professionals to screen for weight categories that may lead to health problems.
A BMI value of:
- under 18.5 indicates underweight;
- 18.5–24.9 is considered healthy;
- 25–29.9 is overweight;
- 30 and above is obese.
While BMI doesn’t distinguish muscle from fat, it’s a practical first step in assessing weight-related health risks.