Health & Body Composition
Coast Guard Body Fat Calculator
The Coast Guard screens body composition with the Navy-style circumference method and enforces maximums by age and sex. Check your numbers here.
The Coast Guard body fat calculator estimates body fat using the Navy circumference method and checks the result against Coast Guard maximum body fat standards, which rise with age from 22% for younger men. Results are screening estimates, not diagnoses — confirm with a clinician before acting on them.
Navy circumference method.
USCG max: 22–24% men, 32–34% women.
Verify against current COMDTINST 1020.8.
Calculate Your Body Fat (Coast Guard)
Your Body Fat
What Is Body Fat (Coast Guard)?
The U.S. Coast Guard screens body composition during weigh-ins using the circumference method, with maximum body fat standards that increase with age.
This calculator applies the Navy-formula estimate and compares it with USCG maximums: men 22–24% and women 32–34% depending on age.
How It Is Calculated
Men: BF% = 495 ÷ (1.0324 − 0.19077·log10(waist − neck) + 0.15456·log10(height)) − 450
Women: BF% = 495 ÷ (1.29579 − 0.35004·log10(waist + hip − neck) + 0.22100·log10(height)) − 450
Example: Example: 30-year-old man, waist 86 cm, neck 38 cm, 178 cm → ≈ 17.8% (within standard)
USCG body fat maximums
| Age | Men | Women |
|---|---|---|
| Under 30 | 22% | 32% |
| 30–39 | 23% | 33% |
| 40+ | 24% | 34% |
Limitations
- Self-measurement differs from official evaluator technique.
- Verify against current COMDTINST 1020.8 policy.
- Estimate only, not a clinical body composition measure.
Sources & Review
References used for this calculator’s formulas and thresholds:
Body Fat (Coast Guard) FAQ
What is the Coast Guard body fat maximum?
Men: 22–24% by age; women: 32–34% by age. The limits step up at ages 30 and 40.
Which method does the Coast Guard use?
A circumference method: waist minus neck for men, waist plus hips minus neck for women, combined with height.
What happens if I exceed the standard?
Members enter a weight management program with command oversight and periodic progress checks until within standards.
Is this calculator official?
No, it's an educational estimate. Official results come from command-administered screening per current policy.
Please read this first: these results are educational estimates, not medical advice. For decisions about your health, talk to a qualified professional.