Weight & Body Composition

Body Mass Index (BMI)

Weight relative to height. A screening tool, not a diagnosis.

Weight

Height

Source: WHO Physical Status report (1995).

Full explanation & reference ranges →

Basal Metabolic Rate (BMR)

Calories your body burns at complete rest.

Weight

Height

Age years

Sex Select… Male Female

Source: Mifflin & St Jeor, Am J Clin Nutr 1990.

Full explanation & reference ranges →

Total Daily Energy Expenditure (TDEE)

Maintenance calories: BMR × activity factor.

Weight

Height

Age years

Sex Select… Male Female

Activity level Sedentary — desk job, little exercise Light — 1–3 sessions/week Moderate — 3–5 sessions/week Active — 6–7 sessions/week Very active — twice daily / physical job

Source: Mifflin × ACSM activity multipliers.

Full explanation & reference ranges →

Body Fat % — Navy method

Estimated from circumferences. Tape-measure based.

Sex Select… Male Female

Height

Neck

Waist at navel

Hip women only

Source: Hodgdon & Beckett, US Navy (1984).

Full explanation & reference ranges →

Waist-to-Hip Ratio

Abdominal fat distribution — predicts cardiometabolic risk.

Sex Select… Male Female

Waist

Hip

Source: WHO expert consultation (2008).

Full explanation & reference ranges →

Ideal Body Weight — Devine

Commonly used in clinical drug dosing.

Height

Sex Select… Male Female

Source: Devine, Drug Intell Clin Pharm 1974.

Full explanation & reference ranges →

Body Surface Area (Mosteller)

Used to index chemo doses and cardiac output.

Weight

Height

Source: Mosteller, NEJM 1987.

Full explanation & reference ranges →