Free BMI calculator: calculate your body mass index
What is BMI?
The Body Mass Index (BMI) is a recognized indicator used to assess a person's body size based on their height and weight. Used by healthcare professionals and international organizations, it is a simple tool for detecting potential weight-related risks.
BMI helps identify different categories such as normal weight, overweight, or obesity. However, it does not replace a medical diagnosis, but it provides a useful initial estimate for better understanding one's nutritional status.
How is BMI calculated?
The calculation of BMI is based on a simple mathematical formula:
BMI = Weight (kg) ÷ Height² (m)
For example, a person weighing 70 kg and measuring 1.75 m will have a BMI of 22.9, which generally corresponds to a weight considered normal.
BMI (Body Mass Index) Calculator
Calculate your BMI to assess your body size based on your height and weight.
Why monitor your BMI?
Maintaining a healthy weight plays an important role in preventing many diseases. A BMI that is too high or too low can be associated with various health risks.
- Cardiovascular risk
- Type 2 Diabetes
- Joint problems
- Metabolic disorders
Regularly monitoring your BMI allows you to adopt more suitable lifestyle habits and better understand your body's needs.
BMI Interpretation Table
| BMI | Interpretation |
|---|---|
| Under 18.5 | Underweight |
| 18,5 – 24,9 | Normal weight |
| 25 – 29,9 | Overweight |
| 30 – 34,9 | Moderate obesity |
| 35 – 39,9 | Severe obesity |
| 40 and over | Morbid obesity |
The limitations of BMI
Although widely used, BMI has some limitations. It does not take into account:
- Muscle mass
- Fat distribution
- Age or sex
For example, an athlete can have a high BMI without excess body fat. It is therefore recommended to interpret this indicator with caution and to supplement it with other assessments.
How to improve your weight balance?
Adopting a healthy lifestyle is the best strategy for maintaining a stable weight in the long term. Several factors can contribute to this balance:
- A varied and balanced diet
- Regular physical activity
- Good stress management
- Quality sleep
Certain nutrient-rich functional foods can also support nutritional balance. To learn more about natural ingredients and their benefits, you can consult our detailed guide:
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When should you consult a healthcare professional?
If your BMI indicates a significant imbalance, it is recommended that you consult a healthcare professional. Personalized support can help identify the causes and develop an appropriate strategy.
Frequently Asked Questions about BMI
Is BMI reliable for everyone?
BMI is a general indicator, but may be less accurate for athletes, the elderly, or pregnant women.
What BMI is considered normal?
A BMI between 18.5 and 24.9 is generally considered to correspond to a normal weight.
How to reduce your BMI?
A balanced diet, regular physical activity and medical monitoring can help reduce a high BMI.
Is a low BMI dangerous?
A BMI below 18.5 may indicate underweight which can lead to nutritional deficiencies.