Body Mass Index (BMI): A Simple Tool to Better Understand Your Weight
The Body Mass Index (BMI) is a widely recognized tool for assessing a person's body size and quickly identifying potential health risks. It is based on two simple and easy-to-measure data points: your weight and your height. With this information, BMI provides a single number that allows you to place yourself in standardized categories defined by the World Health Organization (WHO).
Why BMI is Useful
BMI is a practical first indicator for becoming aware of your weight status. It is used:
- In general medicine, to quickly spot weight-related risks,
- In nutrition and sports, to track changes in body mass,
- By insurers or health institutions, to establish recommendations or follow-ups.
However, be aware: BMI is not a perfect measure. It does not distinguish between muscle mass and fat mass, and can be misleading for certain populations:
- High-level athletes, whose muscle mass can skew the result,
- Pregnant women, for whom body weight naturally changes,
- The elderly, whose body mass distribution changes with age.
It should therefore be considered a general indicator, not a definitive diagnosis.
How to Interpret Your BMI
According to the WHO, the body size categories are as follows:
- Less than 18.5: Underweight
Increased risk of nutritional deficiencies and fatigue. It may be wise to consult a doctor or nutritionist. - Between 18.5 and 24.9: Normal weight
You are in the recommended health range. A balanced lifestyle helps maintain this range. - Between 25 and 29.9: Overweight
Possible increased risk of cardiovascular disease, diabetes, or hypertension. It may be relevant to review some dietary and physical activity habits. - 30 and over: Obesity
Increased health risk, requiring regular medical follow-up. Professional advice is strongly recommended to develop a weight management plan.
Practical Example
A person measuring 1.75 m and weighing 70 kg has a BMI of:
BMI = 70 / (1.75)² ≈ 22.9
This corresponds to a normal body size, meaning this person is within the range recommended by the WHO.
How to Use Our Calculator
Our interactive tool allows you to:
- Enter your height in meters or centimeters,
- Enter your weight in kilograms,
- Instantly get your BMI and find out which category you fall into.
It's a quick and practical way to track your weight and identify possible adjustments for your well-being.
Advice: Use BMI as a guide, but always supplement the assessment with other measures, such as waist circumference, body composition, or advice from a healthcare professional.