Medically reviewed by Dr. Levent Acar, MD
Founder & Lead Hair Transplant Surgeon
Updated on: October 23, 2026
The Norwood scale, also called the Hamilton-Norwood scale or Norwood-Hamilton scale, is the most widely used system for classifying male pattern baldness. It sorts hair loss into seven main stages, from a full hairline (Norwood 1) to a narrow horseshoe of hair at the sides and back (Norwood 7). Dermatologists and hair transplant surgeons use it to describe hair loss in a shared language, track how it changes, and plan treatment.
At Cosmedica in Istanbul, Dr. Levent Acar uses the scale to assess each patient’s pattern before recommending a personal plan. (You may also see it searched as the “Noorwood,” “Nordwood” or even “Norwich” scale.)
The Norwood Scale at a Glance
The Norwood hair loss scale looks at two areas: the frontal hairline, including the temples, and the crown (vertex) at the back of the top of the head. Some men lose density at the front first, some at the crown first, and some in both areas at once.
| Stage | What it looks like | Typical next step |
|---|---|---|
| Norwood 0 (informal) | Low, straight juvenile hairline, no recession | Nothing; baseline photos if hair loss runs in the family |
| Norwood 1 | Full, even hairline; normal density on top | No surgery; monitor |
| Norwood 2 | Slight, symmetrical temple recession ("mature hairline") | Monitor; medication or PRP if it progresses |
| Norwood 2A | Front moves back evenly, without temple points | As for Norwood 2 |
| Norwood 3 | Deep M-, U- or V-shaped temple recession | Earliest stage a transplant is typically recommended |
| Norwood 3A | Whole front recedes as one line | Hairline restoration may be considered |
| Norwood 3 Vertex | Hairline around stage 2, plus a bald spot at the crown | Crown-focused plan and medical therapy |
| Norwood 4 | Deeper recession and a crown bald spot, still separated by a band of hair | Professional evaluation; hairline and crown planning |
| Norwood 4A | Recession extends toward mid-scalp, no separate crown spot | Front-to-back restoration planning |
| Norwood 5 | Very thin bridge between front and crown; horseshoe forming | High-density planning; careful donor assessment |
| Norwood 5A | Front-to-back recession reaches or nearly reaches the crown | As for Norwood 5 |
| Norwood 6 | Front and crown merged; hair only on the sides and back | Large-scale restoration, possibly in two sessions |
| Norwood 7 | Narrow horseshoe-shaped rim of hair at the sides and back | Framing-focused restoration with realistic goals |
What about Norwood 8? The term appears online, usually for complete or near-complete baldness, including thinning on the sides and back. It is an informal label, not part of Norwood’s original classification, which ends at stage 7. The same applies to “Norwood 0.”
The “A” variants (2A, 3A, 4A, 5A) describe a less common pattern in which the hairline recedes evenly from front to back, without a central island of hair or a separate crown bald spot. How often they occur appears to vary by population: in one study of 150 Indian men with male pattern hair loss, 20% showed an A-variant pattern.
The Norwood Stages in Detail
Graft numbers below are rough planning ranges from Cosmedica’s experience. Your own number depends on your donor area, hair characteristics and goals, so use the hair graft calculator or a free analysis for a personal estimate.
Norwood 0: The Juvenile Hairline
Norwood 0 is an informal label for a juvenile hairline: low, fairly straight and with rounded temples, the way the hairline often looks in childhood and the early teens. People searching for a “Norwood 0 hairline” usually mean a hairline that has not started to mature at all. Clinically, it is grouped with Norwood 1.
Treatment options: None needed. If hair loss runs in your family, baseline photos make later changes easier to spot.
Norwood 1: No Significant Hair Loss
Norwood 1 is the control stage of the scale. The hairline looks full and even, there is no visible recession at the temples, and density on top of the scalp is normal. It is common in teenagers and many men in their twenties, and some men stay close to this stage for life. Read more in our Norwood stage 1 guide.
Treatment options: No surgery is needed. If baldness runs in your family, a doctor may discuss minoxidil as a preventive step.
Norwood 2: The Mature Hairline (and Norwood 2A)
Norwood 2 shows slight recession at the temples, often called a “mature hairline.” It is a common, normal part of aging that often appears in the late teens or twenties, and it does not always progress. There is usually no hair loss at the crown, but it can mark the start of change. In Norwood 2A, the whole front moves back evenly instead of forming temple points. See our Norwood 2 guide.
Treatment options: This is the earliest stage where a transplant is typically recommended, often FUE or DHI with roughly 2,000–3,000 grafts, while the donor area is usually still strong.
Norwood 3: Clinically Significant Balding (and Norwood 3A)
Norwood 3 is the turning point. The temples recede deeply into an M-, U- or V-shaped hairline, and frontal thinning becomes noticeable, especially under bright light. It is the first stage generally considered clinically significant balding. In Norwood 3A, the front recedes as one line, including the middle of the hairline. Learn more in our Norwood 3 guide.
Treatment options: Crown restoration is planned specifically for this area, typically adding about 500–800 grafts, alongside medical therapy to slow further loss.
Norwood 3 Vertex: Crown Thinning With a Stable Hairline
In Norwood 3 Vertex, the hairline may only be at stage 2, but a distinct bald spot appears at the crown. Many men first notice it in photos or in a mirror held behind the head. Because a crown pattern can keep widening, it needs its own planning rather than being treated like a hairline case.
Treatment options: Crown restoration is planned specifically for this area, typically adding about 500–800 grafts, alongside medical therapy to slow further loss.
Free Consultation!
Benefit from Dr. Acar’s experience in hair implants to achieve your dream result!
Norwood 4: Frontal and Crown Hair Loss (and Norwood 4A)
At Norwood 4, temple recession deepens and hair loss clearly reaches the vertex. A band of hair still separates the front from the crown, but it is narrowing. This is often when men first seek a professional evaluation. In Norwood 4A, the hairline recedes toward mid-scalp without a separate crown spot. See our Norwood 4 guide.
Treatment options: Plans usually prioritize the hairline, with secondary crown coverage, often in the range of 3,000–4,000 grafts.
Norwood 5: The Narrowing Bridge (and Norwood 5A)
At Norwood 5, the frontal and crown bald areas move closer together and the bridge between them becomes very thin. The remaining hair on the sides and back starts to form a horseshoe. In Norwood 5A, front-to-back recession reaches or nearly reaches the crown. Stages 5 to 7 are more often seen in older men, although early-onset hair loss can progress faster. See our Norwood 5 guide.
Treatment options: A Norwood 5 transplant can restore the hairline, the crown or both, using high-density planning that reinforces the bridge, roughly 3,500–5,000 grafts.
Norwood 6: Merged Balding
In Norwood 6, the hairline is gone and the front and crown have joined into one bald zone. Hair remains only on the sides and back, with minimal coverage on top. Natural-looking results at this stage depend on strategic graft placement and an honest assessment of how far the donor supply can go. See our Norwood 6 guide.
Treatment options: Large-scale restoration of roughly 4,500–6,000 grafts, sometimes over two sessions, focused first on the areas that frame the face.
Norwood 7: Severe Hair Loss
Norwood 7 is the most advanced stage on the original scale. Only a narrow, horseshoe-shaped rim of hair remains at the sides and the base of the scalp. Because donor hair is limited, advanced restoration planning becomes essential, and realistic expectations matter more than at any other stage.
Treatment options: A transplant is still possible with realistic goals: framing the hairline rather than full crown coverage, often 6,000+ grafts, sometimes supplemented with beard or body hair.
Norwood 1 vs Norwood 2: How to Tell the Difference
The difference comes down to the temples. A Norwood 1 hairline is full and even; a Norwood 2 hairline has moved back slightly and symmetrically at the corners. Norwood 2 is often a mature hairline rather than balding, but it is also where change can begin.
| Feature | Norwood 1 | Norwood 2 |
|---|---|---|
| Hairline shape | Full and even | Slightly higher at the corners |
| Temples | No visible recession | Minor, symmetrical recession |
| Crown | Normal density | Usually normal density |
| What it usually means | No significant hair loss | Mature hairline; may or may not progress |
If the recession keeps deepening or the hairline takes on a clear M shape, you may be moving toward Norwood 3.
Hair Loss at the Back of the Head (Crown)
A bald spot on the back of the head is one of the most common signs of male pattern baldness. On the Norwood scale, hair thinning at the back of the head is called vertex or crown loss. It usually starts as a round, thinning patch at the crown that slowly widens.
Crown thinning follows a typical path on the scale. It can appear on its own in Norwood 3 Vertex, while the hairline is still at stage 2. In Norwood 4 and 5, it grows toward the receding front, and by Norwood 6 the two areas have merged. Because the crown is hard to see yourself, many men only notice balding at the back of the head in photos or when someone points it out.
Not all hair fall from the back of the head is male pattern baldness. Signs that suggest another cause include:
- Sudden, smooth, round patches, which may point to alopecia areata (see our article on Rinvoq for alopecia areata)
- Diffuse shedding all over the scalp, for example after illness or major stress
- Itching, redness, scaling, pain or scarring on the scalp
See a doctor or hair specialist if crown hair loss starts suddenly, is patchy, comes with scalp symptoms, or progresses quickly. An accurate diagnosis comes before any treatment decision.
Norwood Scale by Age
Male pattern hair loss tends to become more common and more advanced with age, but there is no fixed Norwood stage for a given age. In a community study of US men, 16% of those aged 18–29 had at least moderate hair loss (Norwood III or higher), rising to 53% of those aged 40–49. Among Australian men, crown or full balding rose from 31% at ages 40–55 to 53% at ages 65–69. Rates also vary between populations: they are lower in Korean men at every age. Genetics set the pace, so two men of the same age can be several stages apart. Treat these as general tendencies, not predictions.
- Teens and 20s: Most men are at Norwood 0–2, and a mature hairline is normal. Clear progression to Norwood 3 or a crown spot at this age is a reason to get assessed early.
- 30s: Many men stay at Norwood 2; others move into Norwood 3 or 3 Vertex as the pattern becomes clearer.
- 40s: Norwood 3–5 patterns are seen more often, with crown loss joining frontal recession in some men.
- 50+: Advanced stages (Norwood 5–7) are more common, though many men never progress beyond the middle stages.
Earlier onset leaves more time for hair loss to progress, which is why surgeons plan with your likely future pattern in mind, not only your current stage.
How to Find Your Norwood Stage
You can estimate your Norwood stage at home in a few minutes. Early signs include a V- or M-shaped recession, thinning at the crown, and a visible contrast between thicker and thinner areas.
- Step 1: Use good, even light. Daylight works best; take photos in the same spot each time so you can compare them.
- Step 2: Photograph the front. Pull your hair back and photograph your hairline straight on, then from each side to see the temples.
- Step 3: Photograph the top. Hold the camera above your head, looking down, to check density in the middle of the scalp.
- Step 4: Photograph the crown. Use a second mirror or ask someone to photograph the back of your head.
- Step 5: Compare with the chart. Match your hairline and crown to the table above. A clear M shape usually means at least Norwood 3. Repeat every few months to track change.
A self-check cannot measure donor density or the quality of your remaining hair. For a personal assessment, send photos for a free hair analysis with Cosmedica. Our team will confirm your stage and explain which options fit your pattern.
What Does "Norwooding" Mean?
“Norwooding” is internet slang for losing hair in a male pattern, in other words moving up the Norwood scale. Someone who is “norwooding” usually has a receding hairline or thinning crown. The term is often used jokingly, but for many men hair loss is a real concern, and an objective assessment of your stage is more useful than comparing yourself with others online.
Norwood vs Other Hair Loss Scales
The Norwood scale is designed for men. Female pattern hair loss usually looks different, with diffuse thinning on top and the frontal hairline largely preserved, so it has its own scales.
The Original Hamilton Scale
In 1951, Dr. James Hamilton published the first classification of male pattern baldness in the Annals of the New York Academy of Sciences, based on more than 700 people of different sexes, ethnicities, and ages. It divided scalps into “not bald” and “bald,” and its type III acted as a catch-all for borderline scalps, which made stages hard to track. In 1975, Dr. O’Tar Norwood studied 1,000 Caucasian men, simplified Hamilton’s system, removed the type III catch-all, and created the Hamilton-Norwood classification used today.
The Ludwig Scale
The Ludwig scale classifies female pattern hair loss in three grades, from mild thinning on top of the scalp to extensive thinning, while the frontal hairline usually stays in place. Women considering treatment can read about hair transplant for women.
The Savin Scale
The Savin scale is also used for women. It builds on the Ludwig approach with more gradual steps of thinning on top of the scalp, plus a separate category for frontal hair loss, allowing finer tracking over time.
Hair Loss Treatment Options by Norwood Stage
The right treatment depends on your age, genetics and stage. Earlier stages usually focus on stabilizing existing hair; later stages focus on restoring coverage with the donor hair available.
| Stage group | Main options | Hair transplant suitability |
|---|---|---|
| Early (Norwood 1–3) | Monitoring, minoxidil, finasteride, PRP, low-level laser therapy | Usually not needed at 1–2; Norwood 3 is the earliest stage where a transplant is typically recommended, often with FUE |
| Moderate (Norwood 3 Vertex–5) | Medication to protect native hair, combined with surgical planning | Often suitable for a hair transplant covering hairline and crown; Micro Sapphire DHI is often used to build density |
| Advanced (Norwood 6–7) | Strategic restoration; medication for remaining hair | Possible with realistic goals: framing the face first, sometimes over two sessions or with beard or body hair |
A free consultation is the simplest way to find out which group you fall into and what your donor area allows.
Why Male Pattern Hair Loss Progresses (and Can It Be Prevented?)
The main cause is genetics, and a family history raises your risk. DHT (dihydrotestosterone), a hormone linked to testosterone, gradually shrinks sensitive follicles until they produce thinner, shorter hairs and eventually stop. Aging, stress, smoking, poor nutrition and hormonal changes may also contribute.
There is no guaranteed way to prevent hereditary hair loss, but early action may slow it. Helpful habits include a balanced diet with enough protein and vitamins, managing stress, avoiding smoking, gentle hair care, and getting advice at the first signs of thinning.
Medical and Non-Surgical Treatments
- Minoxidil: a topical treatment that can slow hair loss and may promote regrowth.
- Finasteride: an oral medication that reduces DHT production and is one of the most effective options for slowing progression; always talk to a doctor first. Read more about finasteride after a hair transplant.
- PRP therapy: uses your own blood plasma to stimulate follicles, sometimes combined with medication.
- Low-level laser therapy (LLLT): also called red light therapy, a non-invasive option that aims to improve blood flow and cellular energy in weakened follicles.
How Your Stage Shapes Hair Transplant Planning
A hair transplant moves follicles from the donor area at the sides and back of the head to thinning or bald areas. Your stage helps estimate how many grafts are realistically available, how dense the donor area is, and which technique will look most natural.
Norwood 3 patients, and selected Norwood 2 cases, are often strong candidates for FUE, in which individual follicular units are extracted with a micro-punch and implanted precisely. Norwood 4–5 patients often benefit from Micro Sapphire DHI, which combines DHI implantation with sapphire-blade micro-incisions to build density while preserving natural angles.
At Norwood 6–7, the focus is realistic coverage and a flattering frontal frame, and Dr. Acar often uses Sapphire FUE to make the most of limited donor hair.
Outcomes vary from patient to patient, and results depend on donor supply, technique and long-term care. Dr. Acar designs each hairline to suit the face rather than chase unrealistic density. You can see examples across different stages in our hair transplant before and after gallery.
Know Your Stage, Then Plan Your Next Step
The earlier you understand your Norwood stage, the more options you usually have, but meaningful improvement is often still possible at advanced stages with the right plan. At Cosmedica in Istanbul, Dr. Levent Acar and his team assess your pattern, donor area, and goals before recommending any treatment for a hair transplant in Turkey, with English-speaking support throughout.
Send a few photos for a free hair analysis to find out your Norwood stage and what is realistic for you. You can also review the price of a hair transplant in Turkey or contact our team with your questions.
Norwood Scale FAQ
What Norwood am I?
Check your hairline in a mirror and your crown with a second mirror or a photo, in good light, then compare both areas with the Norwood chart. Slight, even temple recession usually means Norwood 2; a clear M-shaped recession means at least Norwood 3. A crown bald spot points to a vertex stage. A free hair analysis can confirm it.
Is Norwood 2 balding?
Not necessarily. Norwood 2 is often called a mature hairline: a slight, symmetrical recession at the temples that is a normal part of aging for many men and does not always progress. It can, however, be the first sign of male pattern hair loss, so tracking it with photos is sensible, especially if baldness runs in your family.
What Norwood is a receding hairline?
A receding hairline starts at Norwood 2, where the temples move back slightly. When the recession deepens into a clear M, U or V shape, it is Norwood 3, the first stage of clinically significant balding. If the whole front moves back evenly without temple points, it is an “A” variant, such as Norwood 2A or 3A.
Can you go back down the Norwood scale?
Not in the usual sense. Male pattern hair loss is progressive. Medication such as finasteride or minoxidil can slow it and, in some men, partially improve density. A hair transplant restores coverage, but native hair around the grafts may continue to thin, so long-term planning matters.
At what Norwood stage is a hair transplant possible?
Norwood 3 is the earliest stage where a transplant is typically recommended. At Norwood 1–2, doctors often suggest medication or PRP first to preserve donor hair. Transplants remain possible at Norwood 4–7, but goals shift from full density toward strategic coverage. Your donor area, not only your stage, decides what is achievable.
Is Norwood 3 too early for a hair transplant?
Usually not. Norwood 3 is often considered a good stage for a transplant because the donor area is still strong, allowing a dense, natural-looking result. Plans should also account for future loss, so medication is often discussed alongside surgery. Learn more about whether a hair transplant is permanent.
Can a Norwood 7 get a hair transplant?
Yes, with realistic expectations. Donor hair at Norwood 7 is limited, so the focus is on framing the face with a natural hairline rather than covering the whole scalp. Dr. Acar often uses Sapphire FUE in these cases and may supplement scalp grafts with beard hair. A personal assessment shows what your donor area allows.
What is Norwood 8?
Norwood 8 is not an official stage; Norwood’s original scale ends at stage 7. Online, “Norwood 8” is used informally for complete or near-complete baldness, sometimes including thinning of the remaining hair on the sides and back. In clinical practice, these cases are classified as Norwood 7.