Hair Growth Rate: How Fast Hair Really Grows (UK Guide)
The average hair growth rate on the scalp is about 0.35 mm a day, which works out at roughly 1 cm a month or 15 cm a year, according to StatPearls. That figure is remarkably stable between people. What varies far more is how long each follicle stays in its growing phase, and how much of the length you grow survives the brush, the straighteners and the towel.
Our hair, skin and nails gummies
GrowPro® Hair, Skin & Nails Gummies, £22.95. Sugar free daily gummies for people who would rather chew than swallow a tablet, supporting hair care from the inside out.
Conditioning every wash protects the length your hair has already produced.
Key takeaways
- Scalp hair grows at about 0.35 mm a day, 1 cm a month or 15 cm a year, per StatPearls.
- The growing phase, anagen, can last years, and its length sets your maximum hair length more than speed does.
- Nothing sold in a shop meaningfully increases the rate. Retaining length is where real progress is made.
- The NHS puts normal daily hair loss at 50 to 100 hairs, so some shedding is expected alongside growth.
- Breakage is the usual reason hair appears to stop growing, and it is the one part you can genuinely change.
What is a normal hair growth rate?
A normal scalp hair growth rate is close to 0.35 mm a day, about 1 cm a month and around 15 cm a year, which is the figure StatPearls gives in its physiology of hair. Put in practical terms, a fringe cut too short takes roughly two months to reach the eyebrow again, and shoulder-length hair grown from a buzz cut is a project measured in years rather than months. StatPearls also notes that scalp hair is shed from approximately 100 to 200 follicles a day, while the NHS puts everyday loss at 50 to 100 hairs, so expect some variation between sources on shedding but very little on speed. Knowing the rate is only half of it, so we also set out what is realistic to expect from hair growth.
Body hair behaves differently. It grows more slowly and has a much shorter growing phase, which is why waxed legs stay clear for weeks while a scalp fringe is back in your eyes by the end of the month. The same follicle machinery is running; the timings are simply set differently.
What controls the hair growth rate at the follicle?
Each follicle runs a cycle with three phases, and StatPearls describes them as anagen, the active growth phase in which the follicle produces the fibre, catagen, a short transition, and telogen, the resting phase. Only follicles in anagen are adding length. Because follicles cycle independently and out of step with each other, a scalp is always a mixture, which is why you are never bald between cycles and why shedding is continuous rather than seasonal in any dramatic way.
StatPearls adds that hair growth is regulated by vascular, endocrine and neural signals as well as by age and nutrition. In plain terms: blood supply, hormones, nerves, how old you are and what you eat all feed into the same system. That is a long list of inputs, and it explains why single-factor promises about speed are almost always overselling.
A tape measure is the honest way to track a hair growth rate of about one centimetre a month.
Does hair growth rate change with age, sex or hair type?
Speed changes less than most people expect; duration changes a lot. The daily rate stays broadly similar across adulthood, but the proportion of follicles in anagen and the length of each anagen phase tend to fall with age, so older hair reaches a shorter maximum length before it is released. That is why hair that once reached the middle of the back may now stall at the shoulders even though it is growing at the same millimetres per day.
| Factor | Effect on speed | Effect on achievable length |
|---|---|---|
| Age | Little change in daily rate | Shorter growing phase, so a lower maximum length |
| Hair texture | Little difference in millimetres per day | Tightly coiled hair travels less visible distance per centimetre grown |
| Hormonal change | Indirect, through the cycle rather than the rate | Can shorten anagen and increase shedding |
| Nutrition | Reduced when intake is genuinely poor | Weaker fibre, more breakage, less retained length |
| Heat and chemical styling | None | Substantial, through breakage along the shaft |
Texture is worth spelling out because it causes so much frustration. Tightly coiled hair grows at the same rate as straight hair but travels far less visible distance per centimetre, and every bend in the fibre is a point where it is more fragile. Coily hair can be growing perfectly well and still look as though it is standing still.
Can you actually speed up your hair growth rate?
Honestly, not by much, and anyone promising otherwise is selling something. The daily rate is set by follicle biology rather than by what you put on top of it, and no cosmetic product changes it. What you can influence is the environment the follicle sits in and the survival of the hair once it has grown. A comfortable, non-irritated scalp, reasonable nutrition and a routine that does not snap the fibre are the three levers that exist.
The one area where a genuine deficit can slow things is nutrition, because StatPearls lists nutritional habits among the regulators of growth. Correcting a real shortfall, confirmed by a GP with a blood test, can help. Taking supplements you do not need on the assumption they will speed things up does not, and some, taken in excess, cause problems of their own.
The honest arithmetic
At 1 cm a month, twelve months of perfect habits buys you around 12 cm. Twelve months of straighteners at maximum heat with no conditioner can cost you more than that in breakage. Retention beats acceleration, every time.
Get a discount on the hair growth range
Join the Watermans mailing list and we will email a discount code straight to your inbox, so you can try the hair growth range for less. Made in the UK, over 6.5 million bottles sold since 2012.
What does one centimetre a month mean for common hair goals?
Turning the figure into months is the fastest way to set an expectation you will not be disappointed by. Working from the StatPearls rate of roughly 1 cm a month, a grown-out fringe, a chin-length bob from a pixie, or shoulder-length hair from a bob are all projects with a number attached, and none of that number is negotiable by anything you buy.
| Goal | Approximate length needed | Roughly how long at 1 cm a month |
|---|---|---|
| Fringe back to the eyebrow | 2 cm | 2 months |
| Pixie to a short bob | 8 to 10 cm | 8 to 10 months |
| Short bob to shoulder length | 12 to 15 cm | A little over a year |
| Shoulder to mid-back | 20 to 25 cm | Around two years |
| Buzz cut to shoulder length | 30 cm or more | Two and a half years or more |
Two caveats keep these honest. The table assumes you keep every centimetre you grow, which almost nobody does, so add time for the trims that remove split ends before they travel. And it assumes your growing phase lasts long enough to reach the target, which is the one variable genetics decides for you. If your hair has never passed a certain length despite good care, terminal length rather than speed is the likely explanation.
Why does hair seem to stop growing past a certain length?
Two things are happening, and only one is about growth. The first is terminal length: once the anagen phase ends, that fibre stops extending regardless of how carefully you look after it, so a three-year growing phase at 1 cm a month tops out at around 36 cm. The second, and by far the more common in practice, is that the ends are breaking off at roughly the same speed as the roots are producing new length, so the hair sits at a fixed length indefinitely.
You can tell them apart by looking at the ends. A hair that has reached terminal length has intact, tapered ends. Hair that is breaking has blunt, split, white-tipped or uneven ends and visibly shorter strands scattered through the length. Our guide to what actually stops hair snapping goes through the fixes, and what hair shaft diameter reveals explains why finer hair reaches that ceiling sooner.
How do diet and deficiencies affect hair growth?
Hair is largely keratin, a protein, so chronically low protein intake shows up in the fibre before it shows up almost anywhere else. The NHS lists iron deficiency and weight loss among the causes of hair loss, and both work through the same route: the body ranks hair as non-essential and deprioritises it when supply is short. That is a shedding effect rather than a speed effect, but it looks identical from the outside.
Protein at breakfast does more for your hair than most products on a shelf.
| Nutrient | Why hair needs it | A sensible source |
|---|---|---|
| Protein | Hair fibre is made of keratin | Eggs, fish, dairy, beans, tofu |
| Iron | Low iron is a recognised NHS cause of hair loss | Red meat, lentils, spinach, fortified cereal |
| Zinc | Involved in protein synthesis and tissue repair | Shellfish, seeds, nuts, wholegrains |
| B vitamins | Support normal energy metabolism in fast-dividing cells | Wholegrains, eggs, leafy greens |
| Vitamin D | Widely low in UK winters | Oily fish, fortified foods, a winter supplement |
The sensible order is food first, blood test second, supplement third. If you are genuinely low on something, a GP can confirm it, and correcting a confirmed shortfall is worth doing. If you are not, a gummy is a pleasant habit rather than a lever.
GrowPro Hair Growth Gummies £22.95
Sugar-free vegan gummies with biotin, zinc, MSM, bamboo silica and vitamins C, D3, E and B12. A convenient top-up alongside food, not a replacement for a blood test.
What is the difference between hair loss, hair shedding and hair breakage?
Separating these three is the single most useful thing on this page. Hair loss is a follicle problem: the follicle miniaturises or is damaged, as in pattern hair loss, and the hair that grows back is progressively finer. Hair shedding is a cycle problem: too many follicles enter telogen at once after illness, childbirth, a crash diet or a stressful stretch, and release together a few months later. Hair breakage is a fibre problem: the follicle is fine and the strand is snapping along its length.
Each has a different tell. Loss shows as a changing shape, a widening parting or a receding line. Shedding shows as a sudden increase in hairs on the pillow and in the shower that settles within months, which our guide to how long telogen effluvium lasts covers, and how much shedding is too much puts numbers on. Breakage shows as short broken strands and rough mid-lengths while the roots stay dense.
How do you measure your own hair growth rate?
Pick one strand at the front, near the parting, and measure from the scalp to the end with a soft tape on dry, straightened-out hair. Write the date and the number down, then repeat in exactly the same spot, at the same tension, twelve weeks later. Twelve weeks is the shortest window that gives a readable number, because 1 cm a month means four weeks of growth is inside the margin of error of your own measuring.
If the difference is close to 3 cm over twelve weeks, your hair growth rate is normal and any lack of visible progress is a retention problem, not a growth problem. If it is markedly less, that is worth mentioning to a GP alongside anything else you have noticed, such as fatigue, weight change or heavier shedding. If your question is about products or a routine rather than a medical one, you can talk to Gail Waterman, our co-founder, as an AI avatar on the Watermans homepage.
A gentle wash routine protects the length a normal growth rate produces.
Grow Me® Hair Growth Shampoo £14.95
A sulfate-free shampoo with biotin, caffeine, rosemary, niacinamide and hydrolysed lupine protein. Cosmetic support for a comfortable scalp and fuller-looking hair.
Condition Me® Hair Growth Conditioner £13.95
Cholesterol, shea butter and glycerin help the mid-lengths and ends detangle with less snapping, which is how length actually gets kept.
Frequently asked questions
How fast does hair grow in a month?
About 1 cm, based on the StatPearls figure of roughly 0.35 mm a day. Over a year that is around 15 cm, assuming the ends are not breaking off as fast as the roots produce length.
Can anything make hair grow faster than 1 cm a month?
Not meaningfully. The daily rate is set by follicle biology. Correcting a genuine nutritional deficiency confirmed by a GP can restore a rate that had slowed, but nothing pushes a healthy scalp beyond its normal pace.
Does trimming hair make it grow faster?
No. Trimming happens at the ends and growth happens at the root, so a cut cannot change the rate. Removing split ends does stop splits travelling upward, which helps you keep length.
Why is my hair growing but not getting longer?
Usually breakage. If the ends are blunt, split or white-tipped, you are losing length as fast as you gain it. The alternative explanation is terminal length, where the growing phase has simply ended.
Does scalp massage speed hair growth?
Evidence is limited and mostly small-scale. StatPearls does note that vascular signals help regulate growth, so improving comfort and circulation is plausible, but it is not a reliable way to change the rate.
Is it normal to lose hair while growing it?
Yes. The NHS puts normal daily loss at 50 to 100 hairs, and StatPearls gives a higher figure of 100 to 200 follicles a day. Shedding and growing happen at the same time because follicles cycle independently.
Does hair grow faster in summer?
Small seasonal variation has been reported, but it is nowhere near large enough to notice on your own head. Changes you see across a year are much more likely to reflect styling habits and shedding patterns.
Does coily hair grow more slowly?
No. The hair growth rate is similar, but a coil travels far less visible distance per centimetre grown and is more fragile at every bend, so progress is harder to see and easier to lose.
What is the bottom line on hair growth rate?
Your hair growth rate is almost certainly normal, at around 1 cm a month, and almost nothing you buy will change it. The variables worth your attention are how long your growing phase lasts, which is largely genetic, and how much of the length you produce actually survives to be seen, which is entirely within your control. Eat enough protein, get a blood test rather than guessing at deficiencies, keep heat down, condition every wash and stop dragging a brush through dry hair. That is the whole honest list.
If you want a cosmetic baseline that supports a comfortable scalp while you grow, a sulfate-free hair growth shampoo paired with a breakage-defence conditioner is where to start.
Sources and references
- StatPearls: Physiology, Hair (NCBI Bookshelf)
- StatPearls: Anatomy, Hair Follicle (NCBI Bookshelf)
- NHS: Hair loss
- DermNet: Telogen effluvium
- DermNet: Hair loss, balding, hair shedding, alopecia
Watermans products are 100% cosmetic and do not treat medical hair loss. Individual results may vary.
