What is my hair type? One wash answers most of it. Skip the leave-in and gel this once and let your hair dry on its own. Whatever shape it lands in puts you on the 1 to 4 scale, straight at one end, coily at the other. That’s only check one of five. Strand width, density, porosity and scalp oil decide what products work, and none needs a tool. The free hair type quiz runs through the first four in about a minute.
How Do You Check Your Hair Type at Home?
Checking what type of hair you have starts with clean hair that dried with nothing in it. Water and product both hide the real pattern. Wash the way you always do, but this time no gel, no cream, no brush, no diffuser. When it’s fully dry, hold up a hand mirror and look at the back and the underneath.
The top layer is a poor witness. It takes the most sun and the most brushing, and it usually hangs looser than what’s underneath.
Wet hair misleads too. The water weighs curls down and pulls them long, and then they jump back up as they dry. Coily hair does this the most; dry, it can look half the length it was in the shower. Judge it dry.
How Is Hair Type Categorized?
Hair type is a number plus a letter. The number is the curl family. 1 means straight and 4 means coily, with 2 and 3 in between. From type 2 up, a letter gets added, A for the loosest pattern in that family and C for the tightest. So 3B? A mid-range curl.
Andre Walker, a celebrity stylist best known for his work with Oprah Winfrey, created the system in the 1990s for his own hair care line. His chart stopped at 3B and 4B. Others later added 3C and 4C, and the system spread well beyond his products. Cosmetic chemist Valerie George writes in Happi that it “has since been adopted as a universal system for categorizing hair.” She adds a caveat: “these are generalizations, and the definition may vary depending on the source you’re viewing.”
The letters prove her point. Type 1 letters, and some brand charts, use A, B and C for strand width, fine to coarse. On those brand charts, 2C means coarse waves, not tight ones. The hair types guide explains each code.
What Are the 4 Types of Hair?
The four hair types are straight, wavy, curly and coily. The hair types chart lines up all twelve codes side by side.
Type 1: Straight
Type 1 hair dries straight from root to tip. Scalp oil slides down a straight strand easily. That’s why this family looks greasy sooner than the others. The type 1 hair guide covers all three subtypes.
Type 2: Wavy
Type 2 hair dries in a soft S that lies fairly close to the head, and it’s the family most often mistaken for straight. Hairstylist Nika Pearl-Edwards told NBC News that people with 2A hair “often consider their hair ‘straight.'” More in the type 2 hair guide.
Type 3: Curly
Type 3 hair forms spirals that keep their shape once dry, anywhere from big loose loops to corkscrews you could fit a pencil through. Scalp oil travels down a spiral slowly. The ends get the least of it and dry out first. 3A, 3B and 3C each get their own section in the type 3 hair guide.
Type 4: Coily
Type 4 hair coils tightly or bends in zig-zags, and nothing shrinks more as it dries. 4A holds a small, defined coil. 4B bends in sharp Z shapes with a soft, cottony feel. 4C packs so tightly that little definition shows until it’s wet or styled. The type 4 hair guide goes deeper.
What Else Is Part of Your Hair Type?
Your hair type isn’t finished at the curl code. Four more traits sit under it, and each takes a minute to read.
How do you know if your hair is fine, medium or coarse?
A single shed hair rolled between thumb and finger gives the answer. Barely there means fine. A thin thread means medium. Firm and a little wiry means coarse. Strand width has nothing to do with how much hair you have, a mix-up the fine hair guide untangles.
What is hair density?
Hair density is how many hairs grow on your scalp, not how thick each one is. Check it dry and unstyled, with no part. Scalp in plain view points to low density, a little peeking through to medium. Have to hunt for skin? That’s high. Fine strands at high density feel thick but still go flat under heavy products.
What is low, medium or high porosity hair?
Porosity is how fast hair takes in water and how long it holds it. Low porosity hair lets water bead up and leaves products sitting on top. Medium takes it in steadily and keeps it. High drinks water fast and dries out fast. The hair porosity test sorts yours in eight questions.
Everyone knows the glass-of-water float test. It’s also the least reliable check, and the hair porosity guide explains why.
How do you know if your hair is oily or dry?
Scalp oil is the fifth check, and it mostly tells you how often to wash. On day two after washing, press a clean tissue against your crown for a few seconds. A big, see-through print means oily. A small one is normal. A clean tissue plus a tight, itchy feel points to dry. Flakes need a closer look. Dandruff causes them too.
How Do You Tell Close Hair Types Apart?
Close hair types blur at the edges. Two things usually settle it: where the bend starts, and how tight it gets.
Do you have 1A or 1B hair?
Both dry straight. The difference is strand width and body. 1A is fine, soft and drops a curl fast. 1B has medium-width strands and enough body to bend slightly at the ends. Ends that kick out and frizz in humidity point to 1C instead. The 1B hair guide draws the line.
Is your hair 2A, 2B or 2C?
It comes down to where the wave starts. 2A bends loosely from the mid-lengths. 2B forms a clearer S that begins nearer the root. 2C waves start right at the scalp, often with a few spirals underneath and more frizz. The wavy hair types guide shows all three.
How do you tell 2C hair from 3A hair?
Check whether the strand still reads as an S lying flat against the head, or has wrapped into a spiral. The S is 2C. The spiral is 3A. Hair right on the line often shows both, with waves on top and loops underneath. The 3A hair guide works through the borderline.
Is your hair 3A or 3B?
3A loops are wide and loose, with a shiny, defined S. 3B curls are tighter, springier ringlets with more volume and more frizz. 3C sits one step tighter, in dense corkscrews. Most heads mix two of them. Go by the pattern that covers the most hair. The 3B hair guide compares the three.
Can Your Hair Type Change or Mix?
Your hair type can shift over the years, and most heads carry more than one pattern at once.
Can you have more than one hair type on your head?
Yes, and it’s very common. Stylist Brittany Johnson told NBC News that “many, if not most, people have multiple curl patterns throughout their hair.” On many heads, the nape and the hair around the ears curl tighter than the rest. That combination even has a nickname, Irish curls.
Can your hair type change over time?
It can. “It’s also completely possible to change hair types as you age,” Valerie George writes in the same Happi column. Damage changes the hair you already have, too. Heat damage and chemical straighteners can leave curls looser than they grew. New growth at the roots shows what your follicles make now. Read it after any big change.
How do you find your hair type if it’s short or chemically treated?
Short hair reads straighter than it is. A cropped cut can’t finish a wave. Let it grow a little, or read the longest section, usually the crown. Treated hair? Judge the new growth at the roots. Short cuts trip up men most, and the hair types for men guide covers the fix.
Can a Quiz or AI Tell You Your Hair Type?
A quiz or an AI tool can tell you your hair type, within limits. Photo-based AI reads curl shape from a picture. Bad lighting and damp hair fool it. No camera can feel strand width or watch water soak in. A quiz asks directly. The free Beauty Lies Truth quiz covers four of the five checks in about a minute.
What Is the Rarest Hair Type?
Nobody knows the rarest hair type for sure. No large study has ever sorted people by the 1A to 4C codes, so any ranking is a guess. Most guides say 1A or 4C hair anyway, and almost never show their data. The rarest hair type guide traces where that answer started.
The research that exists uses a different scale. A study of 1,442 people from 18 countries, published in Human Biology, sorted hair into eight shape types by curve diameter, curl index and number of waves, not into the 12 shopper codes. Regional numbers? See the most common hair type guide.
Does Hair Type or Porosity Matter More for Products?
For choosing products, your hair type code matters less than strand width and porosity. Two people with the same 3B can need opposite product weights if one has fine strands and the other coarse. Width sets how much weight hair can carry. Porosity sets how much moisture it holds, and high porosity hair often needs protein too.
The curl code mostly shapes technique: how you apply product and how you dry. So when someone asks “what is my hair type”, the honest answer is a whole line, something like “3B, medium width, high density, high porosity, oily scalp.” Run the checks again after a big cut or a color change.
BeautyLiesTruth publishes hair and personal color guidance built on primary research. Color claims are tested by draping under controlled daylight, and every figure is traced to a published source rather than to another blog.