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Browse all calculatorsThe Army now uses waist at the navel divided by height. Enter both to see your ratio and where the 0.55 benchmark falls. Unofficial estimate, in inches or cm.
Age is not used in the ratio. The page accepts 17 to 100.
Unofficial estimate. Only the official measurement taken by trained Army personnel counts. This page is not affiliated with the U.S. Army and does not record or replace any assessment.
This is a general estimate for educational use. It is not medical advice, a diagnosis or a treatment plan. Talk to a doctor, registered dietitian or other qualified professional before you change your diet, exercise or health care.
Private by design. Everything runs in your browser and is never uploaded.
The Army no longer uses a tape-test body fat percentage. Army Public Affairs reported on 7 July 2026 that it uses the waist-to-height ratio (WHtR): waist at the navel divided by height in inches. A ratio under 0.55 meets the standard. This calculator works out that ratio and shows where the 0.55 line falls at your height.
Results update as you type, in US or metric units, and the working shows every step. It is an unofficial estimate: only the official measurement taken by trained Army personnel counts. For a general body fat estimate that has nothing to do with Army rules, see the body fat calculator, and for other everyday sums browse the free online calculators.
| Waist | Height | WHtR | Against 0.55 |
|---|---|---|---|
| 30 in | 62 in | 0.484 | Under 0.55 |
| 34 in | 70 in | 0.486 | Under 0.55 |
| 38 in | 70 in | 0.543 | Under 0.55 |
| 38.5 in | 70 in | 0.550 | Exactly 0.55: not under |
| 39 in | 70 in | 0.557 | 0.55 or higher |
| 86 cm | 178 cm | 0.483 | Under 0.55 |
| 110 cm | 190 cm | 0.579 | 0.55 or higher |
The first answer is already on screen. Change any number and the ratio updates at once, with no Calculate button.
US takes the waist in inches and the height in feet and inches. Metric takes both in centimetres. Switching converts your numbers, so the same person stays on screen.
Type the waist at the navel and the height. Heights from 100 to 250 cm and waists from 40 to 250 cm are accepted. Outside those limits you get a message instead of a number.
The ratio is shown to 3 decimals with a plain line saying whether it is under 0.55, plus the waist that would sit exactly on the 0.55 line at your height.
Open the working to see each division, copy the result, or share a link that opens with the same numbers. Age is optional and is not used in the ratio.
The Army articles say where the waist is measured but very little about how. Here is what they state, what they leave out, and one general-health method shown only for comparison.
Both place the waist measurement at the navel (belly button) and use height in inches. The 18 September 2026 article says NCOs receive training on taping and measurement protocols, and the 7 July 2026 article says a ratio of 0.55 or greater gets a confirmation test by another team on the same duty day.
Neither article describes how the tape is placed beyond the navel, how tight it is, whether the person breathes in or out, what clothing is worn or how many readings are taken. Ask the unit’s trained staff for the procedure; this page cannot supply it.
The British Heart Foundation describes finding the bottom of the ribs and the top of the hips, wrapping the tape at the halfway point, pulled tight but not digging into the skin, and breathing out naturally. That is general health guidance, not the Army procedure.
Everything in this table comes from two army.mil articles, dated 7 July 2026 and 18 September 2026. Where they word something differently, both wordings are given.
| Topic | What the articles say | Article |
|---|---|---|
| What it replaces | The height and weight tables, the circumference-based tape test and supplemental body fat assessments (7 July). The 18 September article says it replaces the former neck-to-waist tape test. | Both |
| How the ratio is made | Waist circumference at the navel, divided by height in inches. | Both |
| The benchmark | A ratio of less than 0.55 is the benchmark for compliance (7 July). A ratio under 0.55 means soldiers meet the standard (18 September). | Both |
| 0.55 or higher | Soldiers whose WHtR is 0.55 or greater receive a confirmation test by another team on the same duty day, and a formal flagging action continues for a ratio of 0.55 or higher (7 July). Soldiers who exceed 0.55 on both the initial screening and the same-day confirmation test are flagged and enrolled in the Army Body Composition Program (18 September). | Both |
| How often | All soldiers are assessed twice per calendar year, and commanders may direct an assessment at any time (7 July). Every soldier is measured twice annually (18 September). | Both |
| Review and separations | The Army will run a 180-day assessment of the ratio, and no separation actions for failing WHtR occur during the initial 180-day period (7 July). None occur until the review is complete and further guidance is disseminated; the article names Army Directive 2026-13 (18 September). | Both |
| Not stated | Neither article gives a rounding rule, exemptions, age or sex differences, or a detailed tape procedure. The text of Army Directive 2026-13 was not read for this page. | Neither |
The two wordings differ at exactly 0.55: the 7 July article says 0.55 or greater, while the 18 September article speaks of exceeding 0.55 on both tests and says a ratio under 0.55 meets the standard. This calculator therefore shows a ratio under 0.55 as meeting the published benchmark and anything else as not meeting it, and it says so when the result is exactly on or very near the line.
The Army ratio is waist divided by height, so the waist at the line is 0.55 times the height. At 70 inches (177.8 cm) it is 38.5 inches (97.8 cm). A waist equal to the value in the table gives exactly 0.550, which is not under 0.55, so the waist has to be smaller than the number shown.
Each extra inch of waist adds about 0.0143 to the ratio at 70 inches, which is why a small difference in the tape reading can matter near the line. The articles state no rounding rule, so this page compares the unrounded ratio.
Values are 0.55 times the height, converted with 1 inch = 2.54 cm, rounded half up to 1 decimal. They are arithmetic, not Army-published figures.
| Height (in) | Height (cm) | Waist at 0.55 (in) | Waist at 0.55 (cm) |
|---|---|---|---|
| 58 | 147.3 | 31.9 | 81.0 |
| 60 | 152.4 | 33.0 | 83.8 |
| 62 | 157.5 | 34.1 | 86.6 |
| 64 | 162.6 | 35.2 | 89.4 |
| 66 | 167.6 | 36.3 | 92.2 |
| 68 | 172.7 | 37.4 | 95.0 |
| 70 | 177.8 | 38.5 | 97.8 |
| 72 | 182.9 | 39.6 | 100.6 |
| 74 | 188.0 | 40.7 | 103.4 |
| 76 | 193.0 | 41.8 | 106.2 |
| 78 | 198.1 | 42.9 | 109.0 |
| 80 | 203.2 | 44.0 | 111.8 |
For years the phrase meant a tape test that turned body measurements into a body fat percentage. Both Army articles say that test has been replaced, so a page that still prints a body fat percentage is describing the old process.
| Feature | Calculators built on the retired tape test | This calculator |
|---|---|---|
| What it computes | A body fat percentage from tape measurements | The waist-to-height ratio, waist divided by height |
| Rule it reflects | The circumference-based test the articles say is replaced | The 7 July 2026 and 18 September 2026 army.mil articles, with their dates |
| Inputs | Measurements such as neck, waist and sometimes hip, often with age and sex | Waist, height and an optional age that the ratio does not use |
| Answer | A percentage compared with limits | One ratio compared with 0.55, plus the waist that sits on the line |
| What is unknown | Often not mentioned | Rounding, exemptions, age and sex differences and the directive text are listed as not stated |
| Working and sharing | Usually a button and a number | Live result, each division shown, copy and a share link |
The waist-to-height ratio is not a body fat percentage and cannot be converted into one. This page does not compute a body fat percentage and does not reproduce the retired tape-test formulas or limits.
See what a ratio of 0.55 means in inches for a given height, instead of reading only the headline number.
The calculator shows the waist that would sit exactly on the line, so the gap to your own waist is clear.
The working states how far the ratio moves per inch of waist at your height, which shows how sensitive the result is near 0.55.
Enter US or metric measurements and read the line in both units, which helps when a report quotes only one.
The page lists what the articles do not state, such as rounding, exemptions and the tape procedure, so questions go to the right people.
The optional 0.5 view shows the general rule of thumb beside the Army line. The body type calculator looks at other body ratios, and the ratio calculator handles any two numbers.
A calculator has to make choices wherever the source is silent. These are the gaps and the choice this page made for each.
Unofficial estimate. Only the official measurement taken by trained Army personnel counts. This page is not affiliated with the U.S. Army and cannot say how any unit applies the standard.
Neither article gives a rounding rule. This page shows 3 decimals and compares the unrounded ratio with 0.55.
Neither article describes exemptions. The 18 September article says meeting the standard is mandatory for all soldiers regardless of fitness test scores.
Neither article mentions age-specific or sex-specific standards, so the ratio is the same calculation for everyone here. The optional age box is only a scope check.
The 18 September article names Army Directive 2026-13. Its text could not be opened for this page, so nothing here relies on it.
Both articles describe a review of the standard, so details may change. For the current rule, ask the unit or check the army.mil articles.
The articles say height in inches but not how height is rounded or measured. This page uses the height as typed. For a general breakdown of body measurements see the lean body mass calculator.
It cannot record, replace or predict an assessment. A ratio of 0.55 or greater is followed by a confirmation test by another team under the 7 July article, and only the official measurement counts.
The ratio compares two lengths. It does not measure body fat, fitness or health, and it is not medical advice, a diagnosis or a treatment plan. A doctor or other clinician decides what a measurement means for a person.
It reflects the 7 July 2026 and 18 September 2026 army.mil articles. The standard is under a 180-day review, and the directive text was not read.
The ratio definition, the 0.55 benchmark, the confirmation test, the twice-yearly assessment and the 180-day review come from the two army.mil articles below. The 0.5 rule of thumb comes from the NHS page, and the general measuring method from the British Heart Foundation page; both are labelled as not the Army rule. Army Directive 2026-13 is named in the 18 September article, but its text could not be opened when this page was written, so it was not read and nothing here relies on it.
Short answers about the Army waist-to-height ratio, the 0.55 benchmark and the limits of this calculator.
It is a waist-to-height ratio (WHtR) check. Army Public Affairs reported on 7 July 2026 that the Army replaced the height and weight tables, the circumference-based tape test and supplemental body fat assessments with WHtR. This page works out that ratio from your waist at the navel and your height.
Divide the waist circumference at the navel by the height in inches. For example, a 34 inch waist at 70 inches is 34 ÷ 70 = 0.486, which is under 0.55. In centimetres the ratio is the same, because both numbers are divided by 2.54.
The 7 July 2026 article calls a ratio of less than 0.55 the benchmark for compliance, and the 18 September 2026 article says a ratio under 0.55 means soldiers meet the standard. This page shows 0.55 as the published benchmark and treats a ratio under 0.55 as meeting it.
The 7 July article says soldiers whose WHtR is 0.55 or greater receive a confirmation test by another team on the same duty day. The 18 September article says soldiers who exceed 0.55 on both the initial screening and the same-day confirmation test are flagged and enrolled in the Army Body Composition Program.
According to the Army, no. The 7 July article says the circumference-based tape test was replaced, and the 18 September article says the policy replaces the former neck-to-waist tape test. This page therefore does not compute a body fat percentage.
Both articles say at the navel, which is the belly button. They do not describe tape tension, breathing, clothing or the number of readings, and the 18 September article says NCOs are trained in the measurement protocols, so the unit is the place to ask.
Neither article mentions age-specific or sex-specific standards. The text of Army Directive 2026-13 could not be opened for this page, so check with your unit for anything beyond the articles.
Neither article states a rounding rule. This page shows three decimals for display only and compares the unrounded ratio with 0.55, and it adds a note when a result is on or very near the line.
The 7 July article says all soldiers undergo a WHtR assessment twice per calendar year and that commanders may direct an assessment at any time. The 18 September article says every soldier is measured twice annually.
The 7 July article says no separation actions for failing WHtR occur during the initial 180-day assessment period. The 18 September article says none occur until the review is complete and further guidance is disseminated. Neither article says what happens afterwards.
No. The 0.5 view on this page is a general rule of thumb, because the NHS tool page states the aim as a waist of less than half of height. The Army benchmark in the articles is 0.55, and the page shows the two separately.
No, it is an unofficial estimate and is not affiliated with the U.S. Army; only the official measurement by trained personnel counts. The calculation runs in your browser, nothing is uploaded, and the numbers go into the page address only after you change a value or tap Share link.