# cm to Feet & Inches Height Converter + Full Chart > Convert a height between cm and feet & inches exactly, see the 2.54 cm band your whole-inch reading owns, and read both full conversion charts. - **Category:** Conversions & Units - **Calculator:** https://youcalc.com/en/conversions-units/cm-to-feet-inches-height-converter/ - **Price:** Free · no sign-up ## About this calculator Converts a height between centimetres and feet + inches, both directions, live. The conversion itself is exact by definition: 1 inch = 2.54 cm and 1 foot = 12 inches = 30.48 cm were fixed by the 1959 international yard and pound agreement, so nothing here is an estimate. What is not exact is the answer people want, because "5 ft 11 in" is a rounded reading rather than a height — it stands for a 2.54 cm-wide range. This page gives you the exact decomposition, the rounded reading, the precise centimetre band that reading covers, and where inside that band you actually sit. ## How to read your results The headline is your height rounded to the nearest whole inch, which is how heights are spoken. Directly beneath it, the exact row shows the undecided answer — 180 cm really is 5 ft 10.87 in — along with the total in inches, the nearest quarter inch for anyone reading a tailor's tape, and the height in metres. The feet and inches input fields also hold that exact decomposition, which is why they can read 5 ft 11.54 in while the headline says 6 ft 0 in; that is not a bug, it is the rounding step made visible. The band strip shows your reading with its two neighbours and the exact centimetre edges between them, so you can see how close you are to flipping. Two panels sit closed under it and open on a click: the comparison against a national mean — a difference in centimetres and inches, no percentile, for the reason given beside it — and the two full reference tables, which highlight and scroll to the row matching whatever you have entered. ## How it's calculated Exact factors first: 1 in = 2.54 cm and 1 ft = 0.3048 m, both exact by the 1959 international yard and pound agreement and restated in NIST Special Publication 811, Appendix B.9. Since 2023 the international foot is also the only U.S. foot, so the old survey foot never applies to a height. From there: total inches = cm ÷ 2.54; feet = floor(total ÷ 12); leftover inches = total − 12 × feet. Reversed, cm = (feet × 12 + inches) × 2.54. The headline reading rounds the INCH TOTAL to the nearest whole inch, half-up, and then re-splits it into feet and inches. Rounding the leftover inches on their own is the classic error: 181.7 cm is 5 ft 11.54 in, and rounding 11.54 produces the invalid "5 ft 12 in" instead of the correct 6 ft 0 in. The rounding band follows from the same rule. Every whole-inch reading owns an exact 2.54 cm-wide band: the reading n in covers everything that rounds to it, which is (n − 0.5) × 2.54 cm inclusive up to (n + 0.5) × 2.54 cm exclusive. Every band therefore has a hard edge, and that is why a single centimetre can flip the answer and why two sources can disagree about the same person. Those edges are computed by multiplying, not by dividing a centimetre value, because multiplication lands on exact two-decimal centimetres every time: 70.5 × 2.54 = 179.07 cm. The national means come from the NCD Risk Factor Collaboration pooled measurement data (Lancet 2020;396:1511-24) as carried in this site's height dataset: the age-19 cohort for 2019, measured barefoot. Only the difference from the mean is computed from them. ## Worked example - **Your inputs:** Someone types 180 cm and asks whether that is 5 ft 11 in or 5 ft 10 in. - **Results:** 180 ÷ 2.54 = 70.86614… in, which works out at 5 ft 10.87 in before any rounding to whole inches. The leftover 10.87 in is 0.87 past 10, which rounds up, so the reading is 5 ft 11 in — and 5 ft 11 in means exactly 71 × 2.54 = 180.34 cm. That reading owns the band from 179.07 cm up to 181.61 cm, so 180 cm sits 0.93 cm into it, with 1.61 cm still to go before it would become 6 ft 0 in. The answer is 5 ft 11 in, and 5 ft 10 in would need 179.06 cm or less. ## Frequently asked questions ### Is 180 cm 5 ft 11 in or 5 ft 10 in? 5 ft 11 in. Before rounding to whole inches, 180 cm works out at 5 ft 10.87 in, and 0.87 of an inch rounds up. The reading 5 ft 11 in covers every height from 179.07 cm up to (but not including) 181.61 cm, and 180 cm sits near the bottom of that band. You would need 179.06 cm or less to read 5 ft 10 in. Sites that disagree are almost always truncating the leftover inches instead of rounding them. ### What is 5 ft 11 in in centimetres? 180.34 cm exactly: (5 × 12 + 11) × 2.54 = 71 × 2.54 = 180.34. That is the single centimetre value the reading corresponds to, not the range it covers. As a spoken height, 5 ft 11 in describes anyone from 179.07 cm to just under 181.61 cm, which is why two people who both say "five eleven" can be 2.5 cm apart. ### Why does one centimetre change my height in feet? Because an inch is 2.54 cm, so each whole-inch reading owns a 2.54 cm-wide band and every band has a hard edge. At 179.06 cm you are 5 ft 10 in; at 179.07 cm you are 5 ft 11 in. Nothing about you changed — you crossed the midpoint between two whole inches. The band strip on this page shows exactly where those edges fall for your height. ### Is 2.54 cm per inch exact, or is it rounded? Exact, by international agreement. The 1959 international yard and pound agreement defined the yard as 0.9144 m exactly, which makes the inch 2.54 cm and the foot 0.3048 m exactly. NIST publishes both in Special Publication 811, Appendix B.9. There is also no ambiguity left about which foot: since 2023 the international foot is the only U.S. foot, so the slightly different survey foot cannot apply to a height. ### Why do the feet and inches boxes show a decimal like 11.54? Because they hold the exact decomposition rather than the spoken reading. 181.7 cm is genuinely 5 ft 11.54 in; rounding that leftover on its own would give "5 ft 12 in", which is not a valid height. This calculator rounds the inch total instead and re-splits it, which is why the headline reads 6 ft 0 in while the input boxes still show the true remainder. You can type a decimal into the inches box, and you can type a whole number too. ### How do I get the nearest half or quarter inch instead? The result panel gives the nearest quarter inch alongside the whole-inch reading, which is the granularity most tailors and tape measures work at. A quarter inch is 0.635 cm, so a quarter-inch reading owns a band only 0.635 cm wide — much tighter than the 2.54 cm band a whole-inch reading covers. If your height was measured to the nearest centimetre in the first place, quoting eighths of an inch claims more precision than the measurement had. ### Are the country averages the average adult height? Not quite, and the distinction matters. They are the mean height of the age-19 cohort in 2019 from the NCD Risk Factor Collaboration's pooled measured data, which that dataset uses as its adult reference point. An all-ages adult mean is lower, because older cohorts grew up shorter and people lose height with age. The figures are also measured barefoot, so a height taken in shoes runs 2–4 cm high against them. ### Why is there no percentile telling me how tall I am for my country? Because it would be made up. The source publishes population means only; the interval it ships alongside each figure describes how precisely that mean was estimated, not how individual heights are spread around it. Turning a mean into a percentile needs a population standard deviation, and there is not one in the data. Rather than borrow a plausible-looking spread from somewhere else and present the result as fact, this page reports your distance from the mean and stops. ## Related calculators - [Feet and Inches Calculator](https://youcalc.com/en/construction-home/feet-and-inches-calculator/) - [Unit Converter](https://youcalc.com/en/conversions-units/unit-converter/) - [Height Comparison Tool](https://youcalc.com/en/unique-playful/height-comparison-tool/) - [Waist to Height Ratio Calculator (WHtR)](https://youcalc.com/en/health-body/waist-to-height-ratio/) - [BMI Calculator](https://youcalc.com/en/health-body/bmi/) ## Sources - https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b9 — National Institute of Standards and Technology - https://www.nist.gov/pml/owm/si-units-length — National Institute of Standards and Technology - https://www.nist.gov/pml/us-surveyfoot/revised-unit-conversion-factors — National Institute of Standards and Technology - https://www.ncdrisc.org/data-downloads-height.html — NCD Risk Factor Collaboration --- Open full calculator: https://youcalc.com/en/conversions-units/cm-to-feet-inches-height-converter/ · YouCalc — https://youcalc.com