BMI Calculator
Calculate Body Mass Index and find out if your weight is in the healthy range.
BMI (Body Mass Index) is a widely used screening tool that indicates whether an adult is underweight, normal weight, overweight, or obese based on their height and weight. While BMI is not a direct measure of body fat or health, it is a simple, cost-free initial screening tool used by doctors globally and by the Indian health ecosystem. This calculator supports both metric (kg/cm) and imperial (lb/ft/in) units.
📋 How to Use This Calculator
Enter your weight and height in your preferred unit (metric or imperial). The calculator computes your BMI using the formula: BMI = weight (kg) ÷ height² (m²), classifies it into the appropriate category, shows where you fall on the BMI scale, and calculates the healthy weight range for your height. Adults with a BMI of 18.5–24.9 are considered normal weight. The coloured scale indicator visually shows where your BMI falls.
💡 Key Facts & Information
BMI categories globally: Underweight < 18.5; Normal 18.5–24.9; Overweight 25–29.9; Obese ≥ 30. However, the World Health Organization (WHO) recommends lower BMI cut-offs for Asian populations, including Indians: Underweight < 18; Normal 18–22.9; Overweight 23–24.9; Obese ≥ 25. This is because Indians tend to have higher body fat percentage at lower BMI values compared to Western populations — a phenomenon called "thin-fat Indian." According to ICMR-INDIAB study (2023), over 40% of urban Indians are overweight or obese. A healthy BMI is associated with lower risk of type 2 diabetes, hypertension, and cardiovascular disease — India's leading causes of death.