What is BMI?
Body Mass Index (BMI) is a simple calculation that uses your height and weight to estimate body fat. It's a screening tool that can help identify potential weight problems in adults.
How is BMI Calculated?
BMI is calculated by dividing your weight in kilograms by the square of your height in meters. The formula is:
BMI = weight (kg) / height (m)²
BMI Categories
- Underweight: BMI less than 18.5
- Normal weight: BMI 18.5 to 24.9
- Overweight: BMI 25 to 29.9
- Obese: BMI 30 or greater
Important Limitations
BMI has some limitations and should not be used as the sole indicator of health:
- It doesn't distinguish between muscle and fat mass
- It may not be accurate for athletes with high muscle mass
- It doesn't account for age, sex, ethnicity, or body composition
- It may not be suitable for pregnant women or the elderly
Our Tool Features
- Real-time BMI calculation as you type
- Support for both metric and imperial units
- Automatic unit conversion
- BMI category classification
- Target weight range calculation
- History tracking and export functionality
- Accessibility features and responsive design
- Theme switching for better visibility
When to Use BMI
BMI is most useful for:
- Population health studies and research
- Initial health screenings
- General weight management guidance
- Identifying potential health risks
Medical Disclaimer
This BMI calculator is for informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider for personalized medical guidance, especially if you have concerns about your weight or health.
About the Developers
This BMI calculator was developed with accessibility and user experience in mind. We believe that health tools should be available to everyone, regardless of their abilities or device preferences.