Calculate your Body Mass Index instantly. Enter your height and weight to see your BMI, health category, and ideal weight range.
⚠️ BMI is a screening tool, not a diagnostic measure. It does not account for muscle mass, bone density, or body fat distribution. Consult a healthcare professional for a complete assessment.
Body Mass Index (BMI) is a value calculated from a person's height and weight. It provides a simple numeric measure that helps categorize people as underweight, normal weight, overweight, or obese. BMI is widely used by healthcare professionals as an initial screening tool.
Formula: BMI = weight (kg) ÷ height² (m²) | In US units: BMI = 703 × weight (lbs) ÷ height² (in²)
BMI categories defined by the World Health Organization (WHO): Underweight (below 18.5), Normal weight (18.5–24.9), Overweight (25–29.9), Obese Class I (30–34.9), Obese Class II (35–39.9), Obese Class III (40+).