The Norwood scale is a classification system that groups male pattern hair loss into a set of stages, from a full hairline through to extensive baldness at the crown and front. It doesn’t measure severity in a medical sense or predict what will happen to any individual’s hair over time — it’s a shared visual reference that clinicians, researchers and writers use to describe a pattern consistently. Where someone’s hairline and crown sit on the scale today says nothing certain about where it will sit in five or ten years.
What the Norwood scale actually classifies
Developed decades ago and still the most commonly referenced system for describing male pattern hair loss, the Norwood scale (sometimes called the Norwood-Hamilton scale) breaks the typical pattern of thinning into numbered stages. Each stage describes a combination of two things: how far the hairline has receded at the temples, and how much thinning has appeared at the crown. As the stages increase, these two areas of thinning gradually connect, which is why later stages describe a horseshoe-shaped band of remaining hair around the back and sides of the head.
It’s worth being clear about what this is and isn’t. It’s a description of a visible pattern, not a diagnosis, not a prediction, and not a measure of how a person is doing. Two people can be at the same stage and have arrived there through very different timelines, and one stage does not automatically lead to the next on any fixed schedule.
The stages, in general terms
The table below describes the pattern associated with each stage in plain terms. It’s a simplification — real hair loss rarely looks like a textbook diagram, and there are recognised variants (sometimes labelled with an \”A\” suffix) where the hairline recedes more evenly across the front without as much crown involvement early on.
| Stage | General description |
|---|---|
| 1 | No visible recession; hairline sits at or near its original position. |
| 2 | Slight recession at the temples, often described as an adult or mature hairline. |
| 3 | Deeper temple recession that’s noticeable enough to be considered the first clinically recognised stage of pattern loss; some versions of this stage describe crown thinning instead of temple recession. |
| 4 | More pronounced temple recession plus a distinct area of thinning at the crown, with a band of denser hair still separating the two. |
| 5 | The gap between the receding hairline and the thinning crown narrows further, though a band of hair still separates them. |
| 6 | The hairline and crown thinning connect, leaving a horseshoe pattern of hair around the sides and back. |
| 7 | The most extensive pattern on the scale, with a narrow band of hair remaining low on the sides and back of the head. |
If you’re trying to work out whether your own hairline is changing, our piece on how to tell if your hairline is changing covers the practical signs people usually notice first, which tend to show up well before a pattern is easy to pin to a specific stage.
Why the scale is used, and where it falls short
The main value of a shared scale is communication. It lets researchers describe study populations consistently, lets clinicians describe a pattern to a patient without ambiguity, and gives writers and readers a common vocabulary for something that’s otherwise quite subjective to look at. That’s genuinely useful.
Its limits are just as real. The scale was built around a fairly typical progression and doesn’t capture every pattern well — diffuse thinning across the whole scalp, patchy loss, or asymmetric hairlines don’t map onto it cleanly. It also says nothing about the underlying cause. Placing yourself, or someone else, on a Norwood stage tells you what a pattern looks like right now; it doesn’t tell you why it’s happening, how fast it’s moving, or what it will look like next year. Our broader overview of how male pattern baldness tends to progress goes into more detail on the general trajectory this kind of hair loss can follow, while making the same point: individual progression varies and can’t be forecast from a photo or a stage number.
Pattern hair loss versus other kinds of hair loss
Not all hair loss in men follows the pattern the Norwood scale describes. Sudden shedding across the whole scalp, patchy bald spots, or hair loss tied to an illness or medication are different processes with different explanations, and they don’t sit on this scale at all. Our types of hair loss hub is a reasonable starting point if you’re not sure whether what you’re seeing fits the classic pattern described here or looks more like something else. The hair loss in men section covers the range of ways male hair loss can present beyond the standard pattern, and the causes and triggers hub is worth a look if you’re trying to understand what might be driving thinning rather than just how to describe it.
Pattern hair loss itself is strongly influenced by genetics and hormones, and family history plays a real part in who develops it and roughly when it tends to start. If that side of things interests you, our article on whether hair loss is hereditary goes through what’s actually understood about inherited risk, without promising that any individual outcome can be predicted from a parent’s or grandparent’s hairline.
A tool for description, not a verdict
It’s worth sitting with the idea that a stage number is descriptive, not evaluative. Being further along the scale isn’t a failure of anything, and plenty of people reach later stages and are genuinely unbothered by it — that’s a perfectly reasonable outcome, not a problem to be solved. Others decide to look into options for managing or slowing changes to their hair, which is an equally reasonable choice. Either way, a Norwood stage is a snapshot of appearance, not a statement about a person.
If you do want to talk through options, that conversation belongs with a prescriber or dermatologist rather than a website, particularly for anything prescription-only. A stage number can help make that conversation more concrete, but it isn’t a substitute for it.
When a pattern isn’t the whole story
The Norwood scale assumes a fairly typical, gradual pattern. Some presentations sit outside that and are worth having assessed rather than tracked. Sudden or patchy hair loss, a scalp that’s painful, scaly, scarred or unusually shiny, hair loss accompanied by other unexplained symptoms, or any hair loss in a child are all reasons to see a doctor rather than to keep reading about scales and stages. This matters because some forms of hair loss involve scarring that can permanently damage the follicle underneath, so leaving it unassessed has a real cost that simply waiting doesn’t undo. According to MedlinePlus, androgenetic alopecia — the pattern this scale describes — is distinct from these other presentations, which is part of why getting an accurate read on what you’re actually looking at matters more than which stage it might be.
Frequently asked questions about the Norwood scale
What Norwood stage am I?
There’s no reliable way to self-diagnose a precise stage from a description or a mirror check, since the stages blend into each other and lighting, angle and hair length all change how a hairline looks. A doctor or dermatologist can give a more consistent read if you want one.
Does everyone with pattern hair loss go through every stage?
No. Progression isn’t fixed or guaranteed to continue at any particular pace, and some people’s hair loss appears to stabilise for long periods at an earlier stage. Genetics, age and other individual factors all play a part, and none of it can be predicted from the scale itself.
Is there a Norwood scale for women?
Not really — female pattern hair loss usually shows up as diffuse thinning across the crown and part line rather than the receding hairline pattern this scale describes, so a different classification system is generally used. See our article on female pattern hair loss for how that pattern is typically described.
Can you go backwards on the Norwood scale?
The scale describes a visible pattern, and appearance can shift somewhat with things like haircut, length and styling, but the scale itself isn’t designed to track improvement or decline over time. Any questions about what’s realistic for a specific person’s hair belong with a prescriber, not a classification chart.
Is a receding hairline always the start of male pattern baldness?
Not necessarily. Hairlines can look like they’re receding for reasons unrelated to pattern hair loss, including hairstyle, hair texture changes, or simply how a hairline naturally sits as someone matures. Our article on how to tell if your hairline is changing walks through the difference in more detail.
Balds publishes general educational information about hair loss, not medical advice. We are writers, not doctors or dermatologists. If your hair loss is sudden, patchy, painful, or comes with other unexplained symptoms, see a doctor or a dermatologist — some forms of hair loss can become permanent without early assessment.
Related reading
Postpartum Hair Loss: What Happens and When It Settles, Is Hair Loss Hereditary? What Genetics Determine, Alopecia Areata: What Causes Patchy Hair Loss, Receding Hairline: How to Tell If Yours Is Changing.