Weight and BMI describe a height-to-weight ratio; they do not directly reveal how much of body weight is fat. This page gives a rough home estimate from two different equation families: one using BMI, age, and sex, and another using height and circumference measurements. It then shows both estimates, their arithmetic average, and a page reference category.
The page is most useful when adults repeat the measurements in the same way and watch the direction over weeks or months. It is not a DEXA, Bod Pod, hydrostatic-weighing, skinfold, or other professional body-composition test, and one result cannot diagnose obesity, metabolic risk, or athletic ability.
The sex selection changes the BMI/age coefficients, page category thresholds, and circumference equation; female mode also shows and uses hip circumference. It is a formula input label, not a complete model of gender identity, hormone status, or body variation.
The control accepts 18–100 years. Age enters the BMI/age estimate but not the circumference equation. Minors should not apply this adult page’s inputs or categories directly.
It uses an age/BMI/sex equation and a Navy-style circumference equation using waist minus neck for men and waist plus hip minus neck for women, then shows the arithmetic average.
The methods use different body inputs and assumptions; landmarks, breathing, tape tension, body shape, and formula units can all change the difference.
No. It is a page-level arithmetic combination for repeat tracking and trend comparison, not a substitute for DEXA, Bod Pod, hydrostatic weighing, or professional body-composition assessment.
No. It is a page reference label, not a diagnosis, athletic standard, or fat-loss prescription; special situations and health concerns need a clinician or registered dietitian.
Compare an age/BMI estimate with a Navy-style circumference estimate from adult measurements, then view an average reference; results are for trend tracking, not body-composition testing or diagnosis.