A walkthrough, end to end.
- 1
Measure your neck, waist, and (if female) hip with a soft tape, snug but not compressing skin. Use the same protocol the Army does — tape level all the way around, no slack.
- 2
Enter measurements, height, weight, age and sex. The calculator applies the AR 600-9 formula and compares your result to the maximum allowable percentage for your age/sex bracket.
- 3
Read both numbers — your body fat % and whether you pass the AR 600-9 limit. The age table runs 17–20, 21–27, 28–39, and 40+ with progressively higher allowances.
- 4
If you're above the limit, the difference is shown so you know how much you need to lose to fall back within standards.
AR 600-9 circumference method
The US Army uses a logarithmic regression of waist, neck, and height (plus hip for women) — derived from a different reference dataset than the Navy method. The formula gives slightly higher percentages than Navy on average, especially for very lean or very heavy soldiers.
What you can do with this.
Army tape test calculator
If you're preparing for a tape test, use this calculator to see where you stand. Run multiple measurements at slightly different times of day — body fat percentage can vary by 1–2 % based on hydration alone.
AR 600-9 maximum body fat by age
Men: 20% (17-20), 22% (21-27), 24% (28-39), 26% (40+). Women: 30% (17-20), 32% (21-27), 34% (28-39), 36% (40+). The calculator shows your target and current value and computes the difference automatically.
Army Body Composition Program (ABCP)
Soldiers exceeding AR 600-9 limits enter the ABCP — they're placed on a structured program until they're back within standards. This calculator predicts what your tape result would say but doesn't replace your unit's official measurement.
Army Body Fat Calculator for women
Female soldiers add a hip measurement. The female formula uses (waist + hip − neck) under log10. Hip should be measured at the widest point with feet together. The age-bracketed limits are higher than men's by 10 percentage points across the board.
Difference vs the Navy method
Same input shape (neck, waist, height, plus hip for women) but different constants. Army values tend to run 1–3% higher than Navy values on the same body. For non-military use either is fine; for actual Army evaluations, only the AR 600-9 result matters.
How to measure correctly
Stand relaxed, breathe normally. Use a non-stretching cloth tape. Neck: just below the larynx, level all the way around. Waist: at the navel. Hip (women): widest point, feet together. Tape snug but not compressing — you should be able to slip a finger under it.
Army body fat calculator 2026 — what's current
AR 600-9 was significantly updated in June 2023 — that's the standard reflected here. The age-bracketed maximums (20–26% for men, 30–36% for women) and the circumference-based formula are the active 2026 standards. Soldiers preparing for tape tests should always also confirm with their unit's most recent AR 600-9 SOP.
Frequently asked.
Per AR 600-9: men maxes at 20-26% by age bracket. Women maxes at 30-36%. Soldiers exceeding the limit enter the Army Body Composition Program until they're within standards.
No — it implements the AR 600-9 formula correctly but isn't an official Army tool. Actual tape tests follow your unit's measurement protocol with witnesses. Use this calculator for self-check only.
Different reference datasets, different constants. The Army formula was calibrated against Army personnel; the Navy formula against Navy personnel. Body composition profiles in those populations differ slightly, which is why the formulas diverge by 1–3 percentage points.
AR 600-9 acknowledges this — the regulation has a process for individuals whose tape result exceeds the limit but who clearly have high lean mass. Speak with your unit; alternative measurement methods may be available.
Yes — waist circumference can swing 1–2 cm based on time of day, recent meals, hydration, and bowel state. Measure first thing in the morning, fasted, after using the bathroom for the most consistent reading.
No. Every calculation runs in your browser. There's no server processing, no analytics on inputs, no cookies storing your numbers.