5′1″ in cm = 154.94 cm

5′1″ in centimeters

5 feet 1 inch is 154.94 cm. Five feet is 60 inches, plus one makes 61, and 61 × 2.54 = 154.94. The multiplier is exact: according to NIST, the inch has been defined as exactly 25.4 millimeters since 1959.

Rounded to the nearest whole centimeter, that is 155 cm, a difference of just 0.06 cm. In meters it is 1.55 m. Because the match is so close, 155 cm and 5′1″ are used interchangeably on most profiles and forms.

The 5′1″ label covers metric heights from 153.67 cm to 156.21 cm. So 154, 155 and 156 cm all round to 5′1″, while 153 cm rounds down to 5′0″ and 157 cm rounds up to 5′2″.

A height whose percentile depends on your age

In the CDC's National Health and Nutrition Examination Survey (NHANES), which measured 3,307 American women aged 20 and over between August 2021 and August 2023, 5′1″ falls at roughly the 19th percentile. The 15th percentile was 153.9 cm and the 25th was 156.4 cm; in inches, the report gives 60.6 and 61.6. About four in five adult American women are taller than 5′1″.

What makes 5′1″ interesting is how much its rank changes across generations:

For a woman in her twenties, 5′1″ is short: only about one in ten of her peers is that height or shorter. For a woman in her eighties, it is close to the middle of the distribution. The difference between those two medians, 163.3 cm and 156.9 cm, is about 6.4 cm.

Two effects produce that gap. One is generational: NCHS survey reports show that American women aged 20 to 74 averaged 160.2 cm in 1960–62 and 162.5 cm by 1999–2002, so younger cohorts started out taller. The other is aging. The Baltimore Longitudinal Study of Aging measured 2,084 adults repeatedly over years and found that women lost about 5 cm on average between ages 30 and 70, and about 8 cm by age 80. A woman who is 5′1″ at 82 may well have been 5′4″ in her thirties.

For men, 5′1″ is below the NHANES 5th percentile (162.2 cm) in every age group. The height percentile calculator works out the percentile for any age and sex.

Where 5′1″ is the national average

Globally, 5′1″ is an ordinary height for a woman. The NCD Risk Factor Collaboration (NCD-RisC), which reanalyzed 1,472 population-based studies with measured height on more than 18.6 million people, estimates averages within about a centimeter of 5′1″ for women born in 1996 in a long list of countries across South Asia, Southeast Asia, East Africa and Central America. Some of the largest:

Our World in Data puts the global average woman born in 1996 at about 159 cm. A 5′1″ woman is roughly 4 cm below that worldwide figure and about 15 cm below the tallest national average, Latvia's 169.8 cm.

The countries where women have gotten shorter

Behind those averages lies one of the more striking findings of the NCD-RisC study. Over most of the twentieth century, women got taller almost everywhere. But in several of the countries whose averages now sit near 5′1″, height peaked for women born around the 1950s and then fell. NCD-RisC notes that in some countries, people born recently are shorter than those born 50 years earlier.

The site's country data, drawn from NCD-RisC, show the pattern clearly:

In the Democratic Republic of the Congo and Zambia, women born in 1996 are more than 3 cm shorter than those born in 1956. In Pakistan, the decline is about 2 cm. A 5′1″ woman born in the 1950s in Zambia would have been several centimeters below her generation's average; one born in the 1990s is close to it.

Our World in Data, summarizing the same data, notes that male heights in Sub-Saharan Africa have declined since 1970, and describes nutrition as one of the strongest determinants of height, with stunting usually occurring in the first two years of life. Childhood illness, which diverts nutrients and raises metabolic demands, also restricts growth. Falling adult height in a population is therefore read by researchers as a signal of worsening conditions in childhood, decades earlier.

Not every 5′1″ country follows that path. In Myanmar, women gained steadily from 145.6 cm (born 1896) to 154.4 cm (born 1996), and in Sri Lanka from 145.3 cm to 154.6 cm, with no late decline.

How these national averages are built

It is worth knowing what the country figures represent. NCD-RisC did not use self-reported heights at all, explaining that self-reports carry a bias that varies by country, age, sex and education. Instead it pooled population-based surveys in which height was measured, from 179 of the 200 countries it covered, and used a statistical model to estimate the average height each birth cohort reached as young adults, at around 18 years old. The 1996 figures in the tables above therefore describe women who were young adults in the mid-2010s, not the whole adult population today.

That design is why NCD-RisC averages can differ from national surveys that measure everyone at once. In the United States, for example, NCD-RisC estimates women born in 1996 at 163.5 cm, while NHANES, which includes women of all adult ages, reports a mean of 161.2 cm.

Central America: 5′1″ and below

The same data show a cluster of short averages in Central America. NCD-RisC estimates women born in 1996 at 154.5 cm in El Salvador, 154.4 cm in Nicaragua and 153.8 cm in Honduras, all within about a centimeter of 5′1″, with Panama slightly taller at 155.5 cm. Guatemala, at 149.4 cm, has the shortest female average in the world. NCD-RisC notes that El Salvador and Guatemala were also among the countries with the shortest women a century earlier.

5′1″ as a man

For men, 5′1″ is unusual everywhere. NCD-RisC finds the shortest male averages, for men born in 1996, in Timor-Leste, Yemen and Laos at about 160 cm, roughly 5 cm above 5′1″. In the United States, the NHANES 5th percentile for men aged 20 and over is 162.2 cm, and even among men aged 80 and over it is 158.3 cm.

Growing to 5′1″

On the CDC 2000 stature-for-age growth chart, the median girl reaches 154.9 cm at around 12 and a half years, and the median boy at about 13. The chart's median for women at age 20 is about 163.3 cm. Measured against that reference, an adult at 5′1″ sits around the 10th percentile, about 8 cm below the median curve.

These charts describe a reference population; they cannot predict an individual child's adult height. A pediatrician who tracks a child's measurements across several visits is the right person to interpret the pattern.

Petite clothing and 5′1″

Fashion petite sizes are designed for women 5′4″ (163 cm) and under, adjusting proportions as well as overall length. At 5′1″, a woman is about 3 inches below the top of that range, comfortably within it. For comparison, the average American woman measured by NHANES is 161.2 cm, about 6 cm taller than 5′1″ and only 2 cm below the petite cutoff.

Famous people at 5′1″

Two of the most searched celebrities on this site are listed at 155 cm:

• Jenna Ortega: listed at 155 cm (5′1″); see Jenna Ortega's height for comparisons with her co-stars.
• Lady Gaga: also listed at 155 cm.

At 5′1″, both are around the 19th percentile for American women overall and close to the national average in many of the countries listed above. As always, celebrity heights are approximations taken from interviews and profiles rather than clinical measurements.

5′1″ next to a taller partner

Searches often pair 5′1″ with a much taller partner. Two such comparisons have their own pages on this site: 5′1″ vs 6′1″, a gap of exactly 12 inches (30.48 cm), and 5′1″ vs 5′7″, a gap of 6 inches (15.24 cm).

Research on real couples puts those gaps in context. In a 2013 PLOS ONE study of 12,502 UK Millennium Cohort couples, Gert Stulp and colleagues found the man taller in 92.5% of pairs, a little above what random pairing would give. Gaps of 25 cm or more in the man's favor turned up in 13.9% of couples versus 15.7% expected by chance, so the 30 cm gap of a 5′1″ and 6′1″ pairing is less common than average but by no means rare. The researchers concluded that height preferences show up in actual pairings only modestly.

Measuring 5′1″ accurately

The 5′1″ window is 2.5 cm wide, so a single careful measurement usually settles it. Stand barefoot with heels together and heels, buttocks, shoulder blades and the back of your head touching a flat wall, look straight ahead, and have someone press a hardback book flat onto your head to mark the wall. Measure in the morning: a 2011 study in Clinical Biomechanics found an average daily change in stature of about 17.6 mm in healthy adults, enough to move someone from 156 cm to 154.5 cm between breakfast and bedtime.

It also helps to measure rather than rely on memory. A 2018 meta-analysis by Seijo and colleagues, pooling 21 studies of 18,749 women of reproductive age, found that self-reported heights averaged 0.36 cm more than measured ones. The authors judged the gap negligible for research, but near a rounding boundary such as 153.67 cm, the line between 5′0″ and 5′1″, it can decide which label someone uses. When you compare yourself with the NHANES percentiles or the NCD-RisC averages on this page, a measured figure is the fair comparison, because those statistics come from measurements too.