A BMI calculator measures body mass index from height and weight. A BMI under 18.5 is underweight, 18.5–24.9 is healthy, 25–29.9 is overweight, and 30+ is obese.
A BMI calculator measures body mass index from height and weight. A BMI under 18.5 is underweight, 18.5–24.9 is healthy, 25–29.9 is overweight, and 30+ is obese. Our bmi calculator is built on the same core body mass index calculator calculate bmi bmi calculator for women and is trusted by students, professionals and everyday users who need a fast, accurate result. Because every calculation runs locally in your browser, there is no waiting, no sign-up and no limit on how often you use it.
What is BMI and How is it Calculated?
Body Mass Index (BMI) is a numerical measurement derived from weight and height. The formula is: BMI = weight (kg) ÷ height (m)². For imperial units: BMI = 703 × weight (lbs) ÷ height (inches)².
WHO BMI Health Categories
The World Health Organization classifies BMI into four primary categories: Underweight (< 18.5), Normal weight (18.5 | 24.9), Overweight (25.0 | 29.9), and Obese (30.0 and above).
Understanding BMI Results and Limitations
BMI serves as a helpful screening metric for general body composition, though it does not distinguish between muscle mass and fat tissue. Pair BMI findings with waist circumference and clinical guidance.
People Also Search For
100% Free, Instant & Private. All computations run directly in your browser sandbox without sending personal data to any external server.