How Many People Can Roll Their Tongue?

Roughly two out of three to four out of five people can roll their tongue into a tube shape, depending on the population studied. A large Dutch study found that about 84% of participants could perform the movement, while a study of Han Chinese adults in Shaanxi province put the figure closer to 64%. The spread across populations, and the surprising reasons behind it, make tongue rolling a more interesting trait than the simple genetics lesson most of us were taught in school.

What the Numbers Actually Look Like

The most commonly cited figure for tongue rolling ability hovers somewhere around 65 to 85 percent of any given group. A study of a healthy Dutch population found that 83.7% of participants could roll their tongue, making it by far the easiest of five tongue movements tested.¹ Meanwhile, a study of Han Chinese individuals in Shaanxi province recorded a tongue-rolling rate of 63.6%.² Older classroom surveys from the mid-twentieth century, many conducted in Western university populations, tended to land around 65 to 75 percent.

That twenty-point gap between the Dutch and Chinese samples is not trivial, and it reflects a pattern seen across many so-called simple genetic traits: the frequency varies by population, by how the test is administered, and even by what counts as a successful roll. In the Dutch study, about one in ten participants initially misjudged their own ability, either claiming they could roll when they couldn’t or insisting they couldn’t when they actually could.¹ Self-reporting, in other words, is not always reliable. When researchers physically observe the movement rather than just asking, the numbers shift.

The Genetics Myth Most of Us Were Taught

If you took a biology class at any point in the last sixty years, you were probably told that tongue rolling is a textbook example of a simple dominant trait. The lesson goes like this: you inherit one version of a gene that lets you roll, and since it’s dominant, a single copy is enough. People who can’t roll have two copies of the recessive version. Clean, tidy, easy to diagram on the chalkboard.

The reality is messier. The idea of tongue rolling as a single-gene dominant trait dates back to a 1940 paper by Alfred Sturtevant, who later recanted his own conclusion after seeing contradictory data. The most damaging evidence against the simple story comes from twin studies. Identical twins share all of their DNA, so if tongue rolling were determined by a single gene, both twins should always match. They don’t. Researchers have documented pairs of identical twins where one can roll and the other cannot, which is impossible under a simple one-gene model.

Research on morphogenetic traits does still categorize tongue rolling as a trait that appears at higher frequency consistent with dominant inheritance patterns, and some studies have even found a significant relationship between tongue rolling and gender.³ But “behaves like a dominant trait at the population level” and “is caused by a single dominant gene” are very different claims. The current understanding is that tongue rolling is influenced by multiple genes, each contributing a small effect, along with environmental and developmental factors that are not yet well characterized. It runs in families, but not in the neat pattern your biology teacher drew on the board.

Can You Learn to Roll Your Tongue?

This is the question that really unsettles the simple-genetics narrative. And the answer, for at least some people, appears to be yes. Children who cannot roll their tongue at age six or seven sometimes acquire the ability by adolescence, with no change in their DNA to explain it. Anecdotally, many adults report learning to roll through practice, though no large trial has formally quantified the success rate of deliberate training.

What we do know is that the brain’s control of the tongue is remarkably plastic. Tongue movements activate a wide network of brain regions including the sensorimotor cortex, supplementary motor area, thalamus, and cerebellum.⁴ These sophisticated movements are finely regulated by cortical circuits that coordinate the tongue’s complex musculature.⁵

More directly relevant, research using brain stimulation techniques has shown that learning a novel tongue task increases the excitability of the cortical area controlling tongue muscles. The change is specific to tongue motor control and reversible, meaning the brain temporarily reorganizes to accommodate a new tongue skill.⁶ This finding doesn’t prove that every non-roller can become a roller through practice, but it demonstrates that tongue motor abilities are not fixed at birth. The neural pathways governing tongue shape and movement can be reshaped by experience, which explains why some people seem to “discover” the ability later in life rather than having it switched on from day one.

The practical upshot: if you’ve never been able to roll your tongue, it may be worth trying for a few weeks. Some non-rollers find that curling the tongue gently upward while pressing the sides against the upper teeth, then gradually releasing, creates a partial tube that improves with repetition. There are no guarantees, and the anatomy of your tongue’s intrinsic muscles does set some limits. But the line between “can’t” and “haven’t figured out how” is blurrier than most people assume.

Other Tongue Tricks and How Common They Are

Tongue rolling gets all the attention, but the tongue is capable of several other distinct movements that vary wildly in how many people can perform them. The Dutch study tested five specific movements and found a clear hierarchy of difficulty:

Rolling: 83.7% of participants could do it.
Twisting left: 36.1% could twist the tongue to the left.
Twisting right: 35.6% could twist it to the right.
Folding: 27.5% could fold the tongue backward on itself.
Cloverleaf: 14.7% could form the three-lobed cloverleaf shape.

The cloverleaf, where the tongue folds into three distinct humps, was the rarest and hardest movement in the Dutch sample.¹ In the Shaanxi Han Chinese study, the cloverleaf was even rarer: zero percent of participants could perform it.² That complete absence in one population versus nearly 15% in another suggests that the cloverleaf, even more than rolling, may have a stronger genetic component or that different populations have genuinely different distributions of tongue musculature.

Interestingly, these tongue movements are not entirely independent of each other. In the Chinese sample, tongue rolling correlated with tongue folding, and both correlated with the ability to form a pointed tongue.² In other words, if you can roll, you’re somewhat more likely to be able to fold, and vice versa. But the correlations were moderate, not overwhelming. Plenty of people can roll but not fold, or fold but not twist. Each movement recruits a slightly different combination of the tongue’s intrinsic and extrinsic muscles, and your particular anatomy plays a role in which ones come easily.

Does Handedness Have Anything to Do With It?

This is one of those questions that sounds like it shouldn’t have an interesting answer, but it does. A study of nearly a thousand undergraduates at Ohio State University found that left-handed individuals were significantly less likely to report being able to roll their tongue compared to right-handed individuals. Among right-handers, about 75% could roll; among left-handers, only about 63%.⁷

The reason for the connection is not fully understood. One hypothesis involves the broader lateralization of motor control in the brain. Handedness reflects an asymmetry in how the two hemispheres organize movement, and since the tongue’s motor control is also lateralized, it’s plausible that whatever developmental processes produce left-handedness also affect how tongue motor circuits are wired. This doesn’t mean left-handedness causes an inability to roll. It means both traits may share some upstream developmental influence, and the association, while real, is relatively modest. A twelve-point gap is noticeable but not deterministic. Most left-handers can still roll just fine.

Why Population Differences Exist

The twenty-point gap between the Dutch study’s 84% and the Chinese study’s 64% raises an obvious question: is tongue rolling frequency genuinely different across ethnic or geographic populations, or are the differences just artifacts of study design? The honest answer is probably both.

On the artifact side, study methods vary. The Dutch study had researchers directly observe each movement and also compared self-reports against observed performance, catching that roughly 10% error rate mentioned earlier.¹ The Chinese study used direct observation as well, but sample sizes, age distributions, and inclusion criteria differed. When you’re measuring a motor skill that sits on a continuum of partial ability, small differences in what counts as a “roll” can shift the numbers.

On the genuine-difference side, genetic variation across populations is real and well documented for hundreds of traits, from earwax consistency to lactose tolerance. If tongue rolling involves multiple genes, each with its own frequency in different populations, you’d expect exactly the kind of moderate variation we see. The data we have is too sparse to draw confident conclusions about specific populations, and most of the classic surveys were conducted on Western university students, which tells us very little about global variation. What we can say is that tongue rolling appears to be a majority trait everywhere it has been measured, but that majority ranges from a comfortable two-thirds to an overwhelming four-fifths depending on the group.

When the Tongue Does Unusual Things for Medical Reasons

For a small number of people, unusual tongue mobility isn’t a party trick but a sign of a connective tissue disorder. Ehlers-Danlos syndrome, a group of inherited conditions affecting collagen, can cause joint hypermobility throughout the body, and the tongue is not exempt. Case reports have documented patients presenting with voice problems whose physical examination revealed extreme tongue hypermobility, ultimately leading to a diagnosis of Ehlers-Danlos syndrome.⁸ A literature review found only a handful of articles specifically describing tongue hypermobility, and in each case the hypermobility was linked to Ehlers-Danlos.

This doesn’t mean that everyone with an unusually flexible tongue has a connective tissue disorder. The vast majority of people who can roll, fold, or twist their tongue are perfectly healthy. But if you can do things with your tongue that seem extreme, and you also have hypermobile joints, stretchy skin, or chronic joint pain, it may be worth mentioning to a doctor. The tongue’s unusual flexibility can sometimes be the first conspicuous sign of a broader systemic condition that benefits from early management.

How Other Animals Use Tongue Acrobatics

Humans are not the only primates whose tongues perform complex shape changes. Research on macaque monkeys using high-resolution imaging has revealed that during chewing, the macaque tongue simultaneously flexes along its length and rolls about its long axis. The middle portion of the tongue rolls toward the chewing side while the tongue tip flexes to the opposite side, positioning the food between the teeth before the power stroke of the bite.⁹ This twist-and-flex pattern during chewing had been hypothesized for humans but was first captured in three dimensions in macaques.

The finding highlights something easy to overlook: the tongue’s ability to change shape rapidly and precisely evolved primarily for eating and breathing, not for rolling into a tube to impress classmates. Speech is a relatively recent evolutionary addition to the tongue’s job description, and the neural circuitry governing tongue movement is deeply conserved across primates.⁵ The voluntary rolling that humans find so fascinating is, from an evolutionary standpoint, a quirky side effect of having a muscular organ sophisticated enough to manipulate food, generate speech sounds, and contribute to swallowing, all within a few seconds. Whether you can curl yours into a tube says less about your genes than your biology teacher probably told you, and more about the remarkable versatility of a muscle that most of us take for granted.

1
PubMed Central. Five Specific Tongue Movements in a Healthy Population
2
PubMed. The traits of five types of tongue movement in Han of Shaanxi, China
3
Bulletin of Biological and Allied Sciences Research. INVESTIGATING THE INHERITANCE PATTERNS AND POTENTIAL ASSOCIATIONS OF SELECTED HUMAN MORPHOGENETIC TRAITS
4
PubMed. Cortical and subcortical control of tongue movement in humans: a functional neuroimaging study using fMRI
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PubMed Central. Cortical Mechanisms of Tongue Sensorimotor Functions in Humans: A Review of the Magnetoencephalography Approach
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PubMed. Plasticity in corticomotor control of the human tongue musculature induced by tongue-task training
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PubMed. Left-handedness and tongue-rolling ability
8
PubMed. Ehlers-Danlos syndrome presenting as dysphonia and manifesting as tongue hypermobility: Report of 2 cases
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PubMed Central. Twist and chew: three-dimensional tongue kinematics during chewing in macaque primates