BMI Calculator - Calculate Your Body Mass Index

Understanding Body Mass Index (BMI)

Body Mass Index (BMI) is a simple measurement that uses your height and weight to estimate whether you are at a healthy weight. It is calculated by dividing your weight in kilograms by the square of your height in meters.

BMI Formula

BMI = weight (kg) / height (m)²

WHO BMI Categories

BMI Limitations

BMI is a useful screening tool but has limitations:

• Does not measure body fat directly - A muscular person may have a high BMI but low body fat
• Does not account for age - Older adults tend to have more body fat than younger adults at the same BMI
• Does not account for sex differences - Women typically have more body fat than men at the same BMI
• Does not account for ethnicity - Health risks may occur at different BMI values for different ethnic groups
• Does not consider fat distribution - Where you carry fat (belly vs. hips) affects health risk

When to Use BMI

BMI is best used as a general indicator alongside other health measures like waist circumference, body fat percentage, blood pressure, and blood sugar levels. It works well for population-level health assessments and as an initial screening tool.

Healthy Weight Range

For most adults, a BMI of 18.5 to 24.9 is associated with the lowest health risks. Maintaining a healthy BMI can reduce the risk of heart disease, type 2 diabetes, certain cancers, and other chronic conditions.

Medical Disclaimer

This calculator is for informational and educational purposes only. It should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider for personalized health assessments.