BMI FAQ – Common Questions Answered

BMI (Body Mass Index) is a measure that uses your height and weight to estimate body fat and categorize your weight status as underweight, normal, overweight, or obese.

BMI is calculated using the formula: weight (kg) ÷ [height (m)]². You can use our BMI calculator for instant results, or calculate manually using this formula.

BMI is a useful screening tool for most adults, but it has limitations. It may not be accurate for athletes, muscular individuals, children, or the elderly.

BMI categories are: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (≥30). Obesity is further divided into Class I (30-34.9), Class II (35-39.9), and Class III (≥40).

Your BMI number indicates your weight status relative to your height. Lower numbers suggest lower body fat, while higher numbers suggest higher body fat.

Yes, the BMI ranges are the same for both genders, though interpretation may differ due to natural differences in body composition.

BMI is correlated with health risks but doesn't diagnose disease. It's a screening tool that should be used alongside other health indicators.

High BMI is associated with increased risk of type 2 diabetes, heart disease, certain cancers, sleep apnea, and joint problems.

Very low BMI can indicate malnutrition, eating disorders, or other health issues requiring medical attention.

No, BMI should be considered alongside other factors like body composition, fitness level, diet, and overall health markers.

Athletes may have higher BMI due to muscle mass. BMI should be interpreted differently for athletic populations.

Children's BMI is assessed using percentiles based on age and gender, not fixed ranges like in adults.

As people age, body composition changes. Older adults may have slightly higher BMI without increased health risks.

Pre-pregnancy BMI is used to guide weight gain recommendations, but BMI calculations during pregnancy are not standard.