BMI Calculator
Calculate your Body Mass Index based on your height and weight to find your BMI category and healthy weight range.
Learn more
Frequently asked questions
Body Mass Index (BMI) is a measure calculated from your weight and height using the formula: BMI = weight (kg) ÷ height² (m²). It is used as a screening tool to identify potential weight-related health risks.
BMI below 18.5 is underweight, 18.5–24.9 is normal weight, 25–29.9 is overweight, 30–34.9 is obese class I, 35–39.9 is obese class II, and 40 or above is obese class III.
No. BMI does not distinguish between muscle and fat. Athletes with high muscle mass may have an elevated BMI without high body fat. For a fuller picture, consider combining BMI with body fat percentage or waist measurements.