BMI Calculator
BMI Calculator
The BMI (Body Mass Index) Calculator is a free and open-source tool designed to calculate an individual's body mass index based on their weight and height. This tool provides a quick and easy way to assess whether a person has a healthy body weight for their height.
Features
- Calculate BMI using weight in kilograms and height in centimeters
- Displays BMI value with two decimal places
- User-friendly interface with input fields for weight and height
- Copy result functionality for easy sharing
- Automatic calculation as you type
How to Use
- Enter your weight in kilograms
- Enter your height in centimeters
- The BMI will be automatically calculated and displayed
- Use the "Copy" button to copy the result to your clipboard
BMI Categories
- Underweight: BMI < 18.5
- Normal weight: 18.5 ≤ BMI < 25
- Overweight: 25 ≤ BMI < 30
- Obese: BMI ≥ 30
BMI Categories for Children and Adolescents (7-17 years old)
The BMI categories for children and adolescents are different from adults and vary by age and sex. Here's a table showing the overweight and obesity cutoff points for Chinese children and adolescents aged 7-17:
| Age (years) | Boys Overweight (BMI) | Boys Obese (BMI) | Girls Overweight (BMI) | Girls Obese (BMI) |
|---|---|---|---|---|
| 7 | 17.4 | 19.2 | 17.2 | 18.9 |
| 8 | 18.1 | 20.3 | 18.1 | 19.9 |
| 9 | 18.9 | 21.4 | 19.0 | 21.0 |
| 10 | 19.6 | 22.5 | 20.0 | 22.1 |
| 11 | 20.3 | 23.6 | 21.1 | 23.3 |
| 12 | 21.0 | 24.7 | 21.9 | 24.5 |
| 13 | 21.9 | 25.7 | 22.6 | 25.6 |
| 14 | 22.6 | 26.4 | 23.0 | 26.3 |
| 15 | 23.1 | 27.0 | 23.4 | 26.9 |
| 16 | 23.5 | 27.4 | 23.7 | 27.4 |
| 17 | 23.8 | 27.8 | 23.8 | 27.7 |
Use Cases
- Personal health assessment
- Fitness and nutrition planning
- Healthcare and medical screenings
- Research and epidemiological studies
Privacy and Security
This BMI Calculator operates entirely on the client-side, meaning all calculations are performed in your browser. No personal data is stored or transmitted to any server, ensuring your information remains private and secure.
Limitations
While BMI is a useful tool for estimating body fat content, it does have limitations. It doesn't account for factors such as muscle mass, bone density, overall body composition, and racial and sex differences. For a more accurate assessment of health, consult with a healthcare professional.