Compliance & Training-Readiness Tools
Every tool runs in your browser — no sign-up, no data leaves your device. They are framed for military and first-responder readiness and use the same formulas and tables cited on the standards pages.
The calculators here fall into three jobs. The first is screening: given a waist, a height, or a set of tape measurements, does the result clear the gate that applies to you, and if it does not, which service is the binding constraint. That is the question the 2026 Waist-to-Height Ratio screen answers, and the multi-branch checker runs it across every service at once rather than against one set of numbers. The second job is composition tracking, where the point is not to pass a line but to see whether lean mass is holding while fat comes down, which a scale alone cannot show you. The third is sustainment — resting and total energy needs, fluid replacement for training in heat, and energy balance over a training cycle.
Two things are worth knowing before you rely on any figure here. Where a calculator reproduces an official method, it cites the regulation and the formula it implements, so you can check the arithmetic against the source rather than trusting the output. Where a value is an estimate rather than a measurement, such as a circumference body-fat reading or an activity energy burn, the page says so and explains the size of the error you should expect. Nothing here is a substitute for the official assessment your service administers, and for firefighters and police there is no federal body-fat standard at all — those figures differ by state, agency, and role.
Readiness & compliance screens
The pass/fail side of the site. These use the same thresholds and tables cited on the standards pages, so a result here matches what the regulation says.
Multi-Branch Go / No-Go Check
Enter measurements once; see pass/fail against every branch’s 2026 WHtR gate and body-fat limit.
Open tool →Waist-to-Height Ratio (WHtR)
The 2026 DoD primary screen. See if your waist ÷ height is under 0.55 (or 0.52 for Marines).
Open tool →Navy Circumference Body-Fat
Estimate % body fat from neck, waist, and (for women) hip using the exact Navy formula.
Open tool →BMI & Enlistment Screen
BMI with the accession context (Air Force screens roughly 17.5–27.5; Coast Guard 19.0–27.5).
Open tool →BMI for Enlistment Age (13–19)
CDC-growth-chart context for applicants still in the enlistment-age window.
Open tool →Body-composition metrics
Composition measures that are not pass/fail lines. They are useful for tracking change across a training cycle, where a scale weight alone hides what is actually happening.
Lean Body Mass
Lean mass from weight and estimated body-fat — useful for training tracking.
Open tool →Fat-Free Mass Index
Normalize lean mass to height; a physique/readiness reference, not a pass/fail line.
Open tool →Healthy / Accession Weight Range
Weight range for a given height from the BMI 18.5–24.9 band.
Open tool →Energy, hydration & progress
The sustainment layer. These estimate what the body spends, what it needs, and whether the direction of travel over weeks matches the plan you set.
BMR (Metabolic Baseline)
Mifflin–St Jeor resting energy needs — the floor for training fuel.
Open tool →TDEE (Training Energy)
Daily energy needs by activity level, for sustainment during training cycles.
Open tool →Hydration for Training
General water-intake range by body weight (IOM basis).
Open tool →Activity Calorie Burn
Calories burned for a training session by MET value and duration.
Open tool →Energy Balance for Training
Compare intake to TDEE to plan a sustainable training-energy balance.
Open tool →Progress Tracker
Log weight, waist, and tape measurements over time; watch your WHtR and body-fat trend against the 2026 gates. Saved locally.
Open tool →Comparison & reverse calculators
These are the interactive explainers: they take a target and work backwards, or place two approaches side by side so the difference is visible rather than described. They are for planning and understanding rather than for meeting a published standard.
Diet Pattern Comparison
Compare how common eating patterns differ in what they emphasise, so the trade-offs are visible before committing to one.
Open simulator →Target Blood Pressure Reverse Calculator
Work backwards from a target reading to see what the underlying numbers would have to be to produce it.
Open simulator →Target Heart Rate Reverse Calculator
Reverse a target heart-rate zone into the age and resting rate that would place you inside it.
Open simulator →