Free Hair Type Quiz: Find Your Hair Type in 2 Minutes

A hair type is four separate traits, not one: curl pattern, strand diameter, density and porosity. Standard charts show only the first, which is why a 1A to 4C code on its own has never been enough to choose a product with.

The quiz below reads all four in about sixty seconds and returns a code from 1A to 4C, plus the two traits that decide which products actually work on your hair.

Hair Type Quiz

Five questions, about a minute. You will get your type from 1A to 4C, plus your porosity, density and strand texture, and what each one means for how you should be treating your hair.

5 questions. No email needed. Nothing is saved.

Before you start. Answer on clean hair that has air dried with no product in it, and look at the back of your head rather than the top. The canopy gets flattened by brushing, parting and heat long before the nape does, so the back is where your real pattern shows.

Reading your result. The code describes curl pattern. The width, density and porosity readings underneath it are what decide product weight and how much moisture the hair can take. Where the two disagree, follow width and porosity.

The 12 Hair Types

The 12 hair types are 1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B and 4C. The number is curl pattern, running from straight at 1 to coily at 4, and the letter is how tight that pattern gets within its band, from loosest at A to tightest at C.

What Are the Four Parts of a Hair Type?

A hair type has four measurements, not one. Curl pattern is the 1 to 4 number every chart shows. Strand diameter is how thick a single hair is. Density is how many hairs grow per square centimetre of scalp. Porosity is how fast the cuticle takes water in and loses it.

NCBI’s StatPearls puts most healthy adults at 80,000 to 120,000 terminal hairs, and a 2018 trichoscopy study of 166 adults led by Mathew Birnbaum in Skin Appendage Disorders found normal density spanning 148 to 230 hairs per square centimetre.

Curl pattern gets the attention because it is the only one visible in a mirror. The other three are why two people with the same 3B result need different products. The hair types guide covers the system in full.

How Do I Know What My Hair Type Is?

To find your hair type, wash your hair, put nothing in it, and let it air dry untouched. Then read four things: the shape one strand takes from mid-length to end, how thick that strand feels between your fingers, how much scalp shows at your part, and how fast a misted section absorbs water.

1. Wash and air dry with nothing in it. No towel scrunching, no plopping, no diffuser.
2. Read one strand from mid-length to end. Straight is Type 1. An open S is Type 2. A closed loop is Type 3. A tight coil or zigzag is Type 4.
3. Roll a shed hair between your fingers. Barely there is fine. Thread-like is coarse.
4. Mist a small section with room-temperature water and watch it for a minute. Beading on top is low porosity. Absorbing within a minute is normal. Vanishing on contact is high.

Step 4 is the one people skip and the one that changes the most. It also has to be done on hair washed clean, because product residue makes any strand repel water and read as low porosity.

What Questions Does a Hair Type Quiz Ask?

A hair type quiz asks about four things, and any quiz asking about only one of them is a curl chart with a button on it.

The four are curl pattern, which is the shape a dry strand falls into; strand width, which is how thick a single hair feels between finger and thumb; density, which is how many strands grow per square centimetre and shows up as how much scalp is visible; and porosity, which is how fast the hair takes water in and how long it holds it.

Most quizzes ask three or four questions about curl shape alone and return a code. That code is real, but on its own it predicts very little about which shampoo, cream or oil will work, because two people with identical curl patterns and different strand widths need opposite product weights.

How Accurate Is a Hair Type Quiz?

A hair type quiz is accurate about curl family and much less accurate about the letter. Telling straight from wavy from curly from coily is straightforward and most quizzes get it right. Telling 2B from 2C, or 3C from 4A, is where results start disagreeing with each other, including this one.

Three things cause that disagreement.

Hair that is not fully clean and air dried reads a letter or two straighter than it is, which is the single biggest source of error. Shrinkage makes a tight pattern look shorter and tighter than the fibre actually is, and the shrinkage ranges overlap enough that it cannot reliably separate 3C from 4A. And the chart itself was never a measurement instrument, so there is no agreed boundary between one letter and the next for any quiz to check against.

The honest position is that the number is reliable, the letter is a best estimate, and the width and porosity readings are the parts worth acting on. Any quiz presenting a letter as a diagnosis is overselling what the system can do.

What Determines Your Hair Type?

Hair type is determined by the shape of the follicle it grows from, and that shape is set beneath the skin before the hair is visible. Work on cultured human scalp follicles found that curvature is built into the follicle itself, so a curved follicle produces a curved fibre and a straight one produces a straight fibre. Nothing applied to the hair afterwards changes it.

Genetics sits behind the follicle. In European populations, a genome-wide study of 4,845 people found variants in the trichohyalin gene account for around 6 percent of the variance in hair shape, with the straight-hair variants most common in Northern Europeans. A separate variant, EDAR V370A, produces thicker, straighter hair and is carried by most people of East Asian descent. Straight hair arrived twice, through different genes, in different parts of the world.

Width, density and porosity follow different rules. Width and density are largely inherited and shift with age and hormones. Porosity is mostly acquired, since bleach, heat, colour and sun strip the lipid layer that keeps the cuticle water-repellent.

Can You Have More Than One Hair Type on Your Head?

Almost everyone has more than one hair type on their head. A single head commonly carries two or three patterns, with looser hair on the canopy and tighter hair at the nape, behind the ears and under the crown.

The gradient is mostly damage and weight rather than genetics. Sun, brushing, towel-drying and heat all land on the top layer while the under-layers sit protected, and a heavy unlayered canopy pulls its own curl out by sheer mass. Common enough to have picked up a name online, it is covered on the Irish curls page, though it has no connection to Ireland.

For the quiz, answer on the back of your head. That is where the least-disturbed pattern sits, and it is the one a cut and a routine should be built around.

Do I Have 1A, 1B or 1C Hair?

1A, 1B and 1C hair all read as straight, and the difference is how much bend appears and where. 1A has no bend anywhere along the strand. 1B is straight with a soft bend at the ends and more body through the length. 1C is straight with a visible kick at the ends, a wider strand, and frizz in humidity that the other two rarely get.

The line people cross most often is 1A to 1B. Sleep in a loose braid and take it out in the morning: 1A holds nothing at all, while 1B keeps a soft bend. If the strand also feels thick between your fingers and frizzes on a damp day, it is 1C. The type 1 hair guide covers all three in detail.

What Are 2A, 2B, 2C, 3A and 3B Curls?

2A, 2B, 2C, 3A and 3B are five steps along the middle of the chart, running from the loosest wave to a defined ringlet.

The boundary people cross most often is 2C to 3A, and the test is whether the strand still reads as an S lying flat against the head or has wrapped into a spiral. The curl types chart sets all twelve side by side, the wavy hair types guide covers the 2A to 2C range, and the type 2 hair guide covers the wave family as a whole.

What Is the Most Common Hair Type?

Straight and wavy hair together are the most common hair types worldwide, mostly because the regions where straight hair predominates also hold the largest populations. A multinational survey of 19,461 people across nine countries found straight or wavy hair accounted for 86.6 percent of participants in China and 84.3 percent in Japan, while kinky hair reached 59.4 percent in South Africa and 0.9 percent in Japan.

Those are broad categories rather than the twelve consumer codes, and no published dataset ranks the codes themselves by prevalence. The most common hair type page covers the regional figures in full.

What Are the Top 3 Rarest Hair Types?

There is no reliable answer to which hair types are rarest, because nothing has ever been counted. No published dataset ranks the twelve codes by prevalence, so every list naming a top three is repeating other lists rather than citing a measurement.

4C is not the rarest either, despite being the code the question usually points at. It is the most fragile, which is a different claim and a true one: the tightest coils bend sharply enough that mechanical stress concentrates at each turn, and scalp oil cannot travel the length of a coil to reach the ends. Fragile is about handling, not scarcity.

What is genuinely uncommon is a head that reads as one pure code everywhere, since most heads carry two or three patterns. The rarest hair type page traces where the rarity claims came from, and the type 3 hair guide covers the curly band that most of them involve.

Do Babies Get Their Hair Type From Mom or Dad?

Babies get their hair type from both parents. Hair shape is polygenic, meaning many genes each contribute a small effect rather than one gene deciding the outcome, which is why two straight-haired parents can have a curly child and why siblings often land on different codes.

The trichohyalin study above puts one gene’s contribution at around 6 percent of the variance in hair shape, which gives a sense of how distributed the rest of it is. There is no dominant hair-type gene to inherit from one side.

Baby hair is also a poor predictor of adult hair. Texture commonly changes through infancy and again at puberty, so a child’s pattern at two years old says little about what they will have at twenty.

How Do Men Find Their Hair Type?

Men find their hair type the same way as everyone else, with one caveat that changes the result. Short hair hides curl pattern, because a wave needs length to complete a bend, so a cropped head reads straighter than it is.

Judge from the crown or the longest section at the back, or grow it out for a month or two before deciding. Product weight is the other trap: clay and paste hold on fine straight hair where wax and pomade flatten it. The men’s hair types guide covers the full range, and the hair type chart for men matches each code to cuts and clipper guards.

How Do I Test My Hair Porosity?

Test your hair porosity by misting a small section of clean, dry, product-free hair with room-temperature water and watching it for about a minute. Water that beads and sits on top is low porosity. Water that soaks in within a minute is normal. Anything that vanishes on contact is high.

Confirm it with a slide test. Hold one clean shed strand at the tip and slide a finger and thumb up toward the root. Smooth means an intact cuticle and low to normal porosity. Rough or bumpy means raised scales, which is high porosity.

Skip the glass-of-water float test. It is the most repeated porosity test online and the least reliable, because a healthy strand is water-repellent by design and floats, while a damaged strand carrying sebum or silicone is also water-repellent and floats too. Surface tension alone will hold a fine strand on the water regardless of what its cuticle is doing. The hair porosity guide explains the mechanism and covers care at each level.

How Do I Test Hair Density and Strand Width?

Hair density and strand width are two different measurements, and both need testing separately from curl pattern.

For width, roll a single strand between finger and thumb. A strand you can barely feel is fine. One that feels distinctly present or wiry is coarse. Anything in between is medium, which is where most people land. Holding it against a sewing thread makes the call easier. The fine hair guide covers why the fine, medium and coarse scale has no agreed measurement behind it.

For density, gather all your hair into a ponytail and measure the circumference at the base. Under two inches suggests low density, two to four inches medium, and above four inches high. A quicker version is how easily you can see your scalp at the part on dry, unstyled hair.

The two are independent. Fine strands at high density read as a thick head of hair that will not hold a style, and that combination needs completely different products from coarse strands at low density.

Can My Hair Type Change?

Hair type can change, and which part changes depends on the trait. Curl pattern shifts with hormones, which is why pregnancy, menopause, thyroid conditions and some medications can loosen or tighten a pattern that had been stable for years. Chemotherapy commonly changes it outright, and greying coarsens the strand because grey hair grows with a different internal structure.

Strand width changes gradually with age, usually getting finer. Density falls slowly from the twenties onward in most people.

Porosity changes fastest and is the one you control. Bleach, permanent colour, relaxers, flat irons and sun exposure all raise it, and nothing lowers it back, because the lipid layer does not regrow on hair that has already left the scalp.

A reading from five years ago may not describe what is growing now. Retaking the quiz after a major hormonal change or a year of colouring is worth the minute.

What Should I Do With My Hair Type Result?

Use your hair type result in this order: strand width first, porosity second, curl pattern third.

Width decides product weight, and it is the thing people get wrong most often. The same cream that saves high-porosity ends will flatten fine hair for two days. Porosity decides how much moisture the hair can take and whether it needs protein or sealing. Curl pattern decides technique, which is how you apply and dry rather than what you buy.

The type 4 hair guide is the clearest example of why that order matters: the same code covers a huge range of widths and porosities, and the routines that follow from it look nothing alike.

Hair Type Quiz FAQ

Is this hair type quiz free?

Yes. No email, no account, no upsell. Results appear the moment you finish and nothing is stored.

Is this hair type quiz accurate?

It is reliable on the number and a best estimate on the letter. Curl family is easy to read; the boundaries between letters are not defined anywhere precisely enough for any quiz to be certain about them. Treat the width and porosity readings as the actionable part.

What is the difference between hair type and hair texture?

Hair type usually means curl pattern, the 1A to 4C code. Hair texture usually means strand diameter, the fine, medium and coarse scale. They are independent, which is why fine 3B hair and coarse 3B hair behave completely differently.

Can I take the hair type quiz for a man’s hair?

Yes, with one caveat. Short hair reads straighter than it is, because a wave needs length to complete a bend. Judge from the crown or the longest section, or grow it out before deciding.

Does the quiz work for Black and natural hair?

Yes. The quiz runs the full 1A to 4C range, and the curl-tightness question is built around everyday objects rather than photographs so that tightly coiled patterns are not forced into one bucket.

Does my hair type tell me which shampoo to buy?

Less than you would expect. Strand width and porosity predict product performance better than curl pattern, because fine hair behaves like fine hair whether it is straight or curly.

What is 4C hair?

4C is the tightest coil pattern on the chart, with no visible definition until wet and the highest shrinkage of any type, often 70 percent or more. It is the most fragile code to handle and needs the most moisture and the least tension.