📖 Understanding BMI — Your Health at a Glance

Body Mass Index (BMI) is a simple, widely used screening tool that estimates body fat based on your height and weight. While it doesn't directly measure body fat, it provides a quick snapshot of whether you're at a healthy weight for your height. The World Health Organization (WHO) categorizes BMI into several ranges from underweight to obese.

A healthy BMI range is 18.5 to 24.9 for most adults. Below 18.5 indicates underweight, which may signal nutritional deficiencies or other health issues. Above 25 indicates overweight, and above 30 is classified as obese — both of which increase the risk of heart disease, diabetes, hypertension, and other lifestyle diseases.

Important Limitations: BMI doesn't distinguish between muscle and fat. Athletes and bodybuilders often have high BMIs despite low body fat. It also doesn't account for body composition, ethnicity, or fat distribution (waist-to-hip ratio). For South Asians, health risks may start at lower BMIs (23+ instead of 25).

Use this calculator as a starting point. For a complete health assessment, also measure your waist circumference, body fat percentage, and consult a healthcare professional. Combine with regular exercise and a balanced diet for optimal health.