BMI (Body Mass Index) is calculated using: Weight (kg) / Height² (m²)

For example: If you weigh 70 kg and your height is 1.7 m, your BMI = 70 / (1.7 × 1.7) = 24.22

It's a simple screening tool to categorize individuals as underweight, normal weight, overweight, or obese.

BMI has limitations and may not be accurate for:

• Athletes and bodybuilders: Muscle weighs more than fat, so they may have high BMI despite low body fat
• Elderly people: They may have low BMI but high body fat percentage due to muscle loss
• Children and teenagers: BMI is interpreted differently using age and gender-specific percentiles
• Pregnant women: Standard BMI ranges don't apply during pregnancy

BMI doesn't measure body composition (muscle vs fat) or fat distribution. Consider it as one tool among many for assessing health.

Note: For Asian populations, different thresholds may apply (overweight ≥ 23, obese ≥ 27.5).

If you're overweight or obese:

• Create a calorie deficit through balanced diet and exercise
• Aim for gradual weight loss (0.5-1 kg per week)
• Include both cardio and strength training
• Stay hydrated and get adequate sleep

If you're underweight:

• Increase calorie intake with nutrient-dense foods
• Eat more frequently (5-6 small meals)
• Focus on protein and healthy fats
• Consult a healthcare provider to rule out underlying conditions