Service rules and reference checks
2026 Military WHtR Standards by Service
Check your service’s measurement rules before you calculate. Each service specifies where to measure, how many readings to take, how to round, and when follow-up is required.
Standards comparison
| Service | Public rule | Measurement method | Calculation and reporting | Follow-up | Source |
|---|---|---|---|---|---|
| Army | less than 0.55 | Record height to the nearest 0.50 inch. Measure the waist at the navel three times, rounding each measurement down to the nearest 0.50 inch. | Average the three waist measurements to three decimal places, divide that average by height, then disregard digits after the third decimal place without rounding the WHtR. | A second WHtR measurement by a different team on the same duty day is required before administrative action. If the confirmation measurement is still 0.55 or higher, enrollment in ABCP and flagging apply under the public FAQ. | Army Body Composition Program and Standards FAQ, effective July 7, 2026. |
| Navy | 0.5499 or less | Measure the waist twice at the umbilicus on bare skin, round each reading down to the nearest 0.50 inch, and take a third reading only if the first two differ by more than one inch. | Average the two readings, or the two closest if a third reading is required. Round the average down to the nearest 0.50 inch, divide by height, and truncate the ratio to four decimal places. | A reported WHtR of 0.5500 or greater requires the Navy Body Composition Calculation in Step 2. | MyNavyHR Guide 4, Body Composition Assessment, updated June 2026. |
| Air Force | 0.55 reference, not PFRA pass/fail | Measure the waist three times at the midpoint between the lowest rib and top of the hip bone, after a normal exhale. Round each down to half an inch. Take an additional reading if the measurements differ by more than one inch. | Average the three closest readings, round the average down to half an inch, divide by height, and truncate the ratio to two decimal places. This calculator does not determine a PFRA score or pass/fail. | AFMAN 36-2905 paragraph 3.15.4.7 requires secondary body-fat assessment when WHtR exceeds 0.55 and PFRA standards are not met. A ratio alone does not determine that outcome. | AFMAN 36-2905, March 24, 2026, paragraphs 3.15.4.2, 3.15.4.5, and 3.15.4.7. |
| Marine Corps | less than or equal to 0.52 | Measure the waist twice at the navel using a self-tensioning tape. Record the lower measurement rounded down to the nearest 0.50 inch. | Divide the recorded waist measurement by height and compare the WHtR with the Marine Corps standard of 0.52 or less. | Marines who exceed the WHtR standard undergo a body-fat evaluation under current Marine Corps policy. | Marine Corps Body Composition Program Standards, effective January 1, 2026. |
| Space Force | less than 0.55 | Using a spring-loaded tape at about four ounces of tension, take three waist measurements at the umbilicus with the tape horizontal and record each at the end of a normal exhale. | Average the three closest measurements, round down to the nearest 0.50 inch, divide by height in like units, and truncate the WHtR to two decimal places. | Guardians with WHtR of 0.55 or greater receive a further body-fat evaluation under SPFMAN 36-2905. | SPFMAN 36-2905, Body Composition Assessment, September 26, 2025. |
| Coast Guard | 0.55 department-wide reference, not Coast Guard compliance | Measure waist parallel to the floor at the midpoint between the last palpable rib and the top of the iliac crest, typically at or just above the belly button. | Record measurements in inches rounded down to the nearest 0.5 inch, then divide waist by height. | This is an informational department-wide reference, not a Coast Guard compliance decision. The Coast Guard Body Composition Program controls official evaluation and follow-up. | Coast Guard Body Composition Program (program page) |
How WHtR works
- Record height and waist in the same units.
- Follow your service’s instructions for where to measure, how many readings to take, and how to round.
- Divide the recorded waist value by height.
- Keep the required number of decimal places, then compare the ratio with your service’s limit. Check whether a result exactly at the limit is allowed.
Coast Guard: this calculator compares your ratio with the department-wide 0.55 reference. For an official result, follow the Coast Guard Body Composition Program, which has separate assessment rules.
Marine Corps: a ratio of exactly 0.52 is within standard in this calculator, following the current standards page, FAQ, and February 2026 press release. Some supporting documents use <0.52. Check the linked sources if you are comparing results with those documents.
Review and corrections
Reviewed September 4, 2026 by the HeightWaist.com maintainer. The table links to the sources used for each rule. The same rules are available through the standards API.
HeightWaist.com is independent and is not official military policy or medical advice. For an official evaluation, use the current service publication and authorized evaluator. Use Feedback at the top of this page to report a source change or correction.