BMI Calculator
Calculate your Body Mass Index to assess your weight status and health risks
Understanding BMI
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in metres squared.
BMI Categories
How to Use This Calculator
- Select your preferred unit system (Metric or Imperial)
- Enter your weight in kilograms or pounds
- Enter your height in centimeters or inches
- Optionally add your age and gender for more context
- Click "Calculate BMI" to see your results
Important Considerations
- BMI is a screening tool, not a diagnostic tool
- It doesn't distinguish between muscle and fat mass
- Athletes may have a high BMI due to muscle mass
- BMI may underestimate body fat in older persons
- Always consult healthcare professionals for health assessments
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Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight that applies to adult men and women. It's calculated by dividing weight in kilograms by height in meters squared.
What is a healthy BMI range?
A healthy BMI range is typically between 18.5 and 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is obese.
Is BMI accurate for everyone?
BMI is a useful screening tool but has limitations. It doesn't account for muscle mass, bone density, or fat distribution. Athletes and elderly people may get misleading results.
How often should I calculate my BMI?
You can calculate your BMI whenever your weight changes significantly. For weight management, monthly checks are reasonable, but focus more on overall health than just BMI numbers.