How BMI is Calculated
BMI is calculated using the formula: weight (kg) ÷ height (m)². This simple calculation provides a screening tool for weight categories and potential health risks associated with being underweight or overweight.
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Learn About BMI
What is BMI?
Body Mass Index (BMI) is a simple calculation using height and weight. It's calculated as: BMI = weight(kg) ÷ height(m)². BMI provides a reliable indicator of body fatness for most people and is used to screen for weight categories.
BMI Categories
Underweight: BMI less than 18.5
Normal weight: BMI 18.5-24.9
Overweight: BMI 25-29.9
Obese: BMI 30 or greater
Normal weight: BMI 18.5-24.9
Overweight: BMI 25-29.9
Obese: BMI 30 or greater
BMI Limitations
BMI doesn't distinguish between muscle and fat mass. Athletes with high muscle mass may have elevated BMI but low body fat. Blood pressure, cholesterol, fitness level, and body composition are also important.
The "Perfect" BMI
There's no single "perfect" BMI for everyone. The healthy range (18.5-24.9) allows for individual variation. Focus on overall health rather than achieving a specific number.
Healthy Weight Management
Focus on sustainable lifestyle changes: balanced nutrition, regular physical activity, adequate sleep, and stress management. Aim for gradual weight changes of 1-2 pounds per week.
Beyond the Scale
Track additional health markers: energy levels, sleep quality, fitness improvements, and how your clothes fit. These can be more meaningful than BMI alone.
Common BMI Myths
Myth: BMI is always accurate.
Truth: BMI is a screening tool, not a diagnostic of body fatness or health.
Truth: BMI is a screening tool, not a diagnostic of body fatness or health.
The Reality
BMI should be used alongside other health assessments. Consult with healthcare providers for comprehensive health evaluations and personalized advice.
Your Results & Insights
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Complete BMI Guide
Everything you need to know about Body Mass Index and your health
BMI and Health Risks
Research shows correlations between BMI categories and health risks. Higher BMI is associated with increased risk of heart disease, diabetes, and some cancers. Lower BMI may indicate malnutrition or other health issues.
BMI Across Populations
BMI interpretation can vary by age, sex, and ethnicity. Children and teens use BMI-for-age percentiles. Some populations may have different healthy BMI ranges due to genetic and cultural factors.
Privacy & Data Security
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