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Methodology

Ideal Body Weight Resource uses body measurement formulas from the page formula section to convert height, weight, age, sex, and optional circumference inputs into screening or wellness estimates. Results are framed as estimates for education, not as a diagnosis of body fatness, health risk, or disease.

Assumptions

• Height, weight, and circumference measurements are current and taken consistently, preferably without heavy clothing and with the same units selected in the calculator.
• Adult BMI categories use standard CDC adult screening thresholds unless the calculator explicitly asks for pediatric age inputs or percentiles.
• Body-composition formulas estimate population averages and do not directly measure fat mass, lean mass, bone density, or visceral fat.

Limitations

• BMI and related screening formulas can misclassify children and teens, pregnant or recently pregnant people, older adults with low muscle mass, and athletes or very muscular users.
• Body composition, ethnicity, medication use, edema, eating disorders, disability, and clinical history can change what a weight or circumference result means.
• Do not use this result by itself to diagnose obesity, malnutrition, cardiovascular risk, or eligibility for medication, surgery, or a treatment plan.

Sources

• Adult BMI Calculator, Centers for Disease Control and Prevention
• BMI Frequently Asked Questions, Centers for Disease Control and Prevention
• Steps for Losing Weight, Centers for Disease Control and Prevention

Professional guidance: Ideal Body Weight Resource is a wellness screening tool, not medical advice. Use it as a starting point and discuss weight, body-composition, pregnancy, adolescent, athletic, or health-condition concerns with a licensed healthcare professional.