Health metrics, decoded
Each metric page pairs the formula and healthy range with a military / first-responder angle — because the question is rarely just “what is my number?” but “does my number pass the standard?”
WHtR
Waist circumference divided by height — the metric the U.S. military adopted as its joint-force body-compositi…
Open metric →Body fat %
The percentage of your weight that is fat. The U.S. Navy circumference method estimates it from height, neck, …
Open metric →BMI
Weight divided by height squared. Still used for general screening and in some enlistment height-weight tables…
Open metric →WHR
Waist divided by hip circumference — a classic central-obesity index that predates WHtR. The military uses WHt…
Open metric →BMR
The calories your body burns at rest. The Mifflin–St Jeor equation is the most accurate formula for most adult…
Open metric →TDEE
BMR multiplied by an activity factor — the calories you burn per day including training. The number to use whe…
Open metric →FFMI
Lean body mass relative to height — the metric that tells you whether you carry muscle or just weight, and whe…
Open metric →LBM
Your total weight minus fat — muscle, bone, organs, and water. Used to set protein targets and evaluate compos…
Open metric →Ideal weight
Devine, Robinson, Miller, and Hamwi formula estimates of a healthy weight for your height — planning reference…
Open metric →Water intake
Evidence-based hydration targets for your weight and activity — especially relevant to accurate weigh-ins and …
Open metric →