Fitness & Performance
Navy Body Fat Calculator
The Navy's circumference method needs only a tape measure. See your percentage and whether it meets Navy standards for your age.
The Navy body fat calculator uses the U.S. Navy circumference formula: waist minus neck with height for men; waist plus hips minus neck for women. Maximums range from 22% to 36% by age and sex. Use the result as a training benchmark — retest under the same conditions to track progress.
Navy max: 22–26% men, 33–36% women.
Circumference method, tape only.
Two-track system: PFA and BCA.
Calculate Your Body Fat (Navy)
Your Body Fat
What Is Body Fat (Navy)?
The U.S. Navy Body Composition Assessment (BCA) uses the circumference method to estimate body fat, the same formula used in the widely known 'Navy body fat calculator'.
Maximum body fat is 22–23% for men and 33–34% for women, depending on age. The BCA is part of the semi-annual Physical Fitness Assessment cycle.
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: 28-year-old Sailor, waist 85 cm, neck 38 cm, 178 cm → ≈ 17.0% (within standard)
Navy body fat maximums
| Age | Men | Women |
|---|---|---|
| 17–39 | 22% | 33% |
| 40+ | 23% | 34% |
Limitations
- Self-measurement approximates official technique.
- Verify against the current Physical Readiness Program instruction.
- Single-site tape estimates carry a few percentage points of error.
Sources & Review
References used for this calculator’s formulas and thresholds:
Body Fat (Navy) FAQ
What is the Navy body fat maximum?
Men: 22% (17–39) and 23% (40+). Women: 33% (17–39) and 34% (40+).
How is the Navy BCA conducted?
Command fitness leaders measure height, weight, neck and waist (men) or neck, waist, and hips (women), then compute body fat from the circumference equations.
What happens if I exceed Navy standards?
Sailors enter the Fitness Enhancement Program (FEP) until they meet standards, with mandatory participation and periodic re-assessment.
Is the Navy formula accurate for civilians?
Yes, it's one of the best tape-based estimators available, typically within 3–4% of lab measures, which is why it's used by many civilian calculators.
Important disclaimer: Results are educational estimates, not a substitute for professional advice. Review your numbers with a qualified advisor before acting on them.