Calculate body fat from neck, waist, and height measurements in Army-style format.
Overview
Army body composition checks often use circumference tape methods when direct body-fat measurement devices are not available.
This calculator applies tape-test equations and helps screen whether a result may pass or fail standard body-fat limits by age and sex.
Steps
Standards vary by sex and age group.
Neck circumference below larynx, looking forward.
Use abdominal circumference at navel level.
Record widest hip circumference.
Use official measured height.
Check estimated body-fat result against service cutoff.
Math
Male tape estimate: BF% = 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76; Female tape estimate uses waist + hip - neck term
Tape equations estimate body fat from key circumferences and height, allowing field-friendly composition assessment.
Worked cases
BF% = 86.010 log10(20) - 70.041 log10(71) + 36.76
Estimated body fat: about 20.8%
Use female circumference formula with (waist + hip - neck)
Estimated body fat: about 30% (depends on exact values)
Compare BF% with applicable Army maximum
Result indicates pass/fail relative to standard
Why use this
Questions