How do I use the Army Body Fat Calculator calculator?

Enter your numerical input and select desired units to get instant accurate results.

How accurate are the conversions?

Conversions use official ISO conversion factors for maximum precision.

Yes, seamless conversions between metric (meters, kg) and imperial (feet, lbs) are supported.

No, all calculations execute 100% locally in your browser with zero data logging.

Yes, it provides reliable estimates for construction, crafting, science, and everyday math.

The calculator will display a friendly error prompt if non-numeric values are entered.

Calculated using standard mathematical and industry formulas.

Free online Army Body Fat Calculator calculator and unit conversion tool for everyday, engineering, and home projects.

Select your gender and enter your age.
Measure neck circumference below the larynx (perpendicular to long axis of neck).
For males: measure abdomen at naval level. For females: measure waist at narrowest point and hips at widest point.
View calculated body fat percentage and compare against US Army AR 600-9 maximum allowable limits.

US Army Tape Test Logarithmic Formulas

Male %BF = 86.010 × log10(Waist − Neck) − 70.041 × log10(Height) + 36.76

Female %BF = 163.205 × log10(Waist + Hip − Neck) − 97.429 × log10(Height) − 78.387 (in inches).

Male, height 69 in, neck 15 in, waist 32 in → %BF ≈ 15.2% (Passes for age 25).

The US Army Body Composition Program (AR 600-9) uses circumference measurements to estimate body fat.
Maximum allowable body fat standards for males: 20% (17–20 yrs), 22% (21–27 yrs), 24% (28–39 yrs), 26% (40+ yrs).
Maximum allowable body fat standards for females: 30% (17–20 yrs), 32% (21–27 yrs), 34% (28–39 yrs), 36% (40+ yrs).
Neck measurements are taken just below the larynx, rounding up to the nearest 0.5 inch.

Your estimated body fat percentage according to Army tape equations.

Indicates whether your body fat meets military standards for your age group.

How do I use the Army Body Fat Calculator calculator?: Enter your numerical input and select desired units to get instant accurate results.
How accurate are the conversions?: Conversions use official ISO conversion factors for maximum precision.
Does it convert metric and imperial units?: Yes, seamless conversions between metric (meters, kg) and imperial (feet, lbs) are supported.
Is my data stored?: No, all calculations execute 100% locally in your browser with zero data logging.
Can I use this for DIY or engineering projects?: Yes, it provides reliable estimates for construction, crafting, science, and everyday math.
What if I enter invalid inputs?: The calculator will display a friendly error prompt if non-numeric values are entered.

Body Fat Calculator: Tape Measure Navy Method — Calculate your body fat percentage, lean body mass, and fat mass using the US Navy circumference method. Track fitness body recomposition and waist measurements.
Lean Body Mass Calculator — Estimate your Lean Body Mass (LBM) using Boer, James and Hume equations.
BMI Calculator: Body Mass Index for Adults — Calculate your Body Mass Index (BMI) using metric or imperial units. Compare your score with official WHO weight categories from underweight to obese.

Note: JavaScript is required for live interactive calculations. Published formulas and reference content remain fully accessible above.