Use this free Army body fat calculator for an educational one-site tape estimate from sex, age, body weight, and abdomen circumference.
male, age 25, 210 lb, 35 in abdomen
This page is not an official Army record, DA Form 5500/5501 entry, waiver, flagging decision, or medical assessment.
Estimate the current Army one-site tape body fat percentage.
Compare the rounded estimate with the age-group reference limit.
Practice how weight and abdomen circumference move the estimate.
Avoid treating a quick web estimate as an official military decision.
17.48%, rounded to 17%
26.475%, rounded to 26%
22.87%, rounded to 23%
24% reference limit
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
Plain-language answers about when to use the estimate, what the formula means, what it cannot decide for you, and how privacy works.
Use it for simple educational checks, trend tracking, or planning tasks like these: Estimate the current Army one-site tape body fat percentage. Compare the rounded estimate with the age-group reference limit. It can help you understand a number, but it cannot explain your whole health situation.
Enter sex, age, body weight in pounds, and abdomen circumference in inches. The current Army one-site method uses the abdomen measurement at the navel, not neck, hip, or height measurements. Use a non-stretch tape, keep it level, and do not pull it tight enough to dig into the skin.
In plain language: Male Army one-site estimate = -26.97 - (0.12 x weight in lb) + (1.99 x abdomen in in). Female estimate = -9.15 - (0.015 x weight in lb) + (1.27 x abdomen in in). The result is rounded to the nearest whole percent and compared with the age-group reference limit. Read the result together with the notes on the page, because health and fitness numbers often need personal context.
Read the rounded percentage as an educational one-site tape estimate. The reference limit line uses the Army age-group table for context, but this website is not an official Army record, DA Form 5500/5501 entry, waiver, flagging decision, or medical assessment.
Yes. This page uses the 2023 one-site equation shown on current DA Form 5500 and DA Form 5501: males use weight in pounds and abdomen circumference in inches; females use weight in pounds and abdomen circumference in inches. It does not use the older neck, hip, and height tape equation.
Age does not change the one-site body-fat equation. It changes the reference limit used for comparison: 17-20, 21-27, 28-39, or 40 and older. Treat that comparison as a reference note, not an official compliance decision.
Use the abdomen at the navel level. The official worksheets tell measurers to take the abdomen measurement three times, round down to the nearest 0.50 inch, and average the readings. This page gives a quick estimate from the number you enter.
This is not an official Army determination, DA Form 5500/5501 entry, record, waiver, flagging decision, or pass/fail result. Use official policy and trained personnel for official assessments. Use the calculator as a learning tool, then ask a qualified professional about decisions that affect care, pregnancy, medication, nutrition, or safety.
Check the units, date, and personal details before reading the answer. For example, pounds and kilograms, inches and centimeters, or a wrong activity level can change the result quickly. If the number feels surprising, rerun it slowly and compare it with the examples.
No. The calculator runs in your browser tab. Recent answers stay only on the page while you use it, and they are not sent to a server.