No. For children and adolescents, BMI is age- and sex-specific because the amount of body fat changes with age and differs between boys and girls. A healthcare provider will use BMI-for-age percentile charts to assess a child's weight status.

Not necessarily. BMI is a screening tool, not a diagnostic tool. A healthcare provider would perform further assessments, such as skinfold thickness measurements, diet evaluation, and physical activity assessment, to determine if excess body fat is a problem.

Achieving and maintaining a healthy weight requires a balanced approach that includes a nutritious diet and regular physical activity. Consult with a healthcare provider or a registered dietitian to create a personalized plan that is right for you.

Yes, other methods to measure body fatness include skinfold thickness measurements, underwater weighing, bioelectrical impedance, and dual-energy x-ray absorptiometry (DXA). However, these methods are not always readily available, and they can be expensive.