Body Weight

Calculate adult body mass index with metric or US units, see the CDC/NHLBI BMI category, and review healthy-weight range context.

Estimate body fat percentage with the U.S. Navy circumference method or BMI method, with metric and US units plus fat-mass context.

Estimate adult lean body mass with Boer, James, and Hume formulas, compare methods, and optionally compare against a known body-fat percentage.

Estimate a current ectomorph, mesomorph, or endomorph body-type tendency from wrist circumference, with optional BMI context and cautious limitations.

Calculate body surface area with Mosteller, Du Bois, Haycock, Boyd, and Gehan equations using metric or US units, with medical-use cautions.

Calculate waist-to-hip ratio and optional waist-to-height ratio with metric or US measurements, screening ranges, and measurement cautions.

Check adult underweight status from BMI, healthy-weight range, gain needed to reach BMI 18.5, and cautious calorie context.

Check adult BMI category, healthy-weight range, weight above BMI 24.9, waist context, and 5% and 10% weight-loss markers.

Estimate body fat percentage with the U.S. Army one-site tape test context and compare the result with age and sex reference limits.

Calculate an adult healthy-weight range from height using BMI 18.5 to 24.9, with US or metric units and non-diagnostic health context.

Calculate a child's BMI with age, sex, height and weight, then review an approximate BMI-for-age percentile band and screening caveats.

Compare adult ideal body weight formulas including Devine, Robinson, Miller, Hamwi, Broca and Lorentz, with a healthy BMI range for context.