How Often to Cut Hair? Intervals by Length and Goal
9 min read Care know-how Updated 5 October 2026 By Anna Sophie Schulenburg
Shoulder-length and longer hair needs a cut every eight to twelve weeks if you want the shape to hold; short cuts are due after four to six weeks, a fringe after just three to four. If you're growing your hair, stay at ten to twelve weeks and have only three to five millimetres taken off each time. Your ends also tell you how often to cut your hair. Take a strand from the nape of your neck today, hold it against a dark top and look at the last five centimetres: forks, pale little knots or an end that tapers off thin mean your next appointment is due sooner than planned. If a few millimetres are enough for your hairdresser to reach smooth, closed ends, your interval is right.
How often to cut hair: the intervals at a glance
Two questions decide the interval. Do you want to keep the shape or gain length? And how quickly does your cut show that a centimetre has grown back? On a chin-length bob one centimetre visibly shifts the line; on chest-length hair nobody notices it.
| Hair and cut | Goal | Interval | How much comes off |
|---|---|---|---|
| Short cut, pixie, clipped nape | Keep the shape | 4–6 weeks | about as much as has grown: 1–1.5 cm |
| Bob with a blunt line | Keep the line | 6–8 weeks | 1–2 cm |
| Fringe | Keep it out of your eyes | 3–4 weeks | a few millimetres, fringe only |
| Shoulder to chest length, layered | Keep layers and shape | 8–12 weeks | 1–2 cm |
| Shoulder to chest length, one length | Grow it longer | 10–12 weeks | 3–5 mm as a micro-trim |
| Very long, waist length and beyond | Keep the length | 12–16 weeks | 0.5–1 cm |
| Short cut you want to grow out | Grow it out | 6–8 weeks | nape and ears only, the top stays |
When you're growing your hair, the last column matters more than the interval. You gain length mainly by having less taken off at each appointment; you hardly need to push the appointment back for that.
How to tell your ends are due a trim
The calendar gives you a guideline. The ends themselves are more precise. Check them in daylight, with one strand from the nape and one from the side, because that's where collars, scarves and pillows rub most.
| What you see or feel | What it means | How much has to go |
|---|---|---|
| The ends lie smooth, the comb glides through | Your ends are fine | nothing, or the planned micro-trim |
| The last 2–3 cm are lighter and thinner than the lengths | The cuticle has worn away, and split ends often start there | 0.5–1 cm |
| Small white knots just before the end | The fibre has frayed inside and will soon snap there | 0.5 cm above the highest knot |
| The ends fork like a Y or a tiny broom | Split ends | 0.5 cm above the highest fork |
| The ends tangle every day, despite conditioner | Roughened ends catch on each other | 0.5–1 cm, then check again |
| On unlayered hair the ponytail is clearly thinner at the bottom than at the top | The ends have been snapping for months, often from heat or hair ties | up to where the ponytail is thick again, spread over two appointments |
If more than one row fits, the free hair analysis asks how you wash, colour and blow-dry and sorts that into suggestions for the weeks between two cuts.
Single knots you can snip off yourself between appointments, with the twist technique for white dots on hair ends: twist the strand into a cord and cut only what sticks out at the side.
How much length you keep in a year
On average hair grows about a centimetre a month, so roughly twelve centimetres a year. How much of that stays is decided by the scissors. The maths is simple, and it explains why some people grow their hair for years and still end up at shoulder length.
| Rhythm | Cuts per year | Off per cut | Off per year | Left of about 12 cm growth |
|---|---|---|---|---|
| Every 6 weeks | 8–9 | 1.5 cm | 12–13 cm | nothing, the length stays the same |
| Every 8 weeks | 6–7 | 1 cm | 6–7 cm | about 5–6 cm |
| Every 12 weeks | 4 | 0.5 cm | 2 cm | about 10 cm |
| Never | 0 | 0 | 0 | 12 cm on paper, less in reality |
The last row is misleading. Untrimmed split ends travel up the fibre, the ends break off bit by bit, and at the next appointment your hairdresser has to cut above the highest fork. Then several centimetres you spent half a year collecting can go in one go.
For growing, the third row is therefore the target: a micro-trim every ten to twelve weeks that takes only the last three to five millimetres. If your hair already has split ends, start with a corrective cut up to the healthy ends. After that the small rhythm is enough.
Does trimming your ends make hair grow faster?
Lots of people have their ends trimmed so their hair grows faster. It doesn't work. Hair is made in the follicle beneath the scalp, and no pair of scissors reaches that far. The pace is set by genes, age and hormones, and in a deficiency also by your supply of iron or protein. The myth survives anyway because regularly trimmed hair breaks off less at the bottom. It grows at the same speed and loses less, so it looks like more length.
| Claim | Verdict | Why |
|---|---|---|
| Hair grows faster after a cut | False | The scissors never reach the follicle, the pace stays at around 1 cm a month |
| Cutting makes hair thicker | Half true | Each strand stays just as thick. The ends look fuller because the thin, tapered tips are gone |
| Hair cut under a waxing moon grows better | No evidence | There is no reliable proof that the moon affects hair growth. Booking by the lunar calendar does no harm, though |
| Split ends can be singed off with a candle | Harmful | The flame scorches healthy ends too, leaves frazzled tips and can burn hair and skin |
| Good care makes a cut unnecessary | False | An ends fluid holds forks together until the next wash. Only scissors can remove them |
| Curls need cutting less often | Mostly true | Breakage shows less in curls, and the shape lasts longer. Dry ends tangle more, though, so check them anyway |
Agreeing at the salon how much comes off
Step 1 — Check your ends beforehand. Do the strand check from the table above the day before your appointment, in daylight. Then you know whether a micro-trim is enough or whether the ends have to go above the highest split.
Step 2 — Show the length. “Just the ends” means something different to every hairdresser. Show with your thumb and index finger how much may come off, or give a number: “five millimetres at most”. Add that you want to gain length. Then she knows to reset only the line and leave the layers alone.
Step 3 — Settle wet or dry. Wet hair stretches more and looks longer. Curly hair shrinks by several centimetres as it dries, so it's usually cut dry or curl by curl. If you wear your hair blow-dried straight day to day, say so, so the line sits straight in that form.
Step 4 — Record where you are. Right after the appointment, take a photo from behind, hair down, in daylight, and pick a landmark: shoulder blade, bra strap or waistband. Put the next appointment in your diary straight away using the table above. In the next photo the landmark shows you whether the length has gained.
Between appointments: protecting your length
Your routine between appointments decides how far you can stretch the interval. Every fork that never forms is one less to cut off next time.
Blow-dry on a medium setting at about 15 cm and first spray a heat protectant for your hair into the lengths, two to three sprays for shoulder-length hair. Detangle wet hair with a wide-tooth comb, ends first, then section by section upwards. Tie ponytails with spiral ties or fabric scrunchies without a metal join and vary the height so the tie doesn't press on the same spot every day. At night a satin or silk pillowcase protects the ends from friction; a loose plait does the job too.
If you use MONAT: REJUVABEADS® goes on the last few centimetres and wraps a film around visibly split ends, which then lie smoother until the next wash. Cutting them off is still the scissors' job. The MONAT Bond IQ™ system belongs in the lengths you want to keep, especially after bleaching or lots of heat, and supports the fibre there; it doesn't close an end that has already split. Whether you need Bond IQ™ or REJUVABEADS® more depends on whether your lengths are snapping or only your ends are forking.
How your hair type shifts the rhythm
The first table starts from cut and goal. Your hair type moves the interval forward or back once more.
| Hair type | What changes | Interval |
|---|---|---|
| Fine and straight | Thin ends show quickly, the line visibly frays | on the early side: 8–10 weeks |
| Strong and thick | The weight holds the shape, layers grow out more slowly | 10–12 weeks |
| Curly or coily | Breakage shows less, dry ends tangle more, usually cut dry | 12–16 weeks |
| Bleached or heavily lightened | Brittle ends have to come out in stages | 6–8 weeks, until the ends settle |
| Straightened or curled daily | Heat roughens the ends faster | about 8 weeks, with heat protectant |
After lightening, the tight rhythm applies only until the brittle centimetres are out. Then you switch back to the row for your cut. Until then your lengths get conditioner after every wash and heat only with protection, as is the rule for bleached hair anyway.
Cutting mistakes and how to correct them
- Not cutting for months to save length → three to five millimetres every ten to twelve weeks
- Asking for “just the ends” → name the allowed length in millimetres or show it with your fingers
- Cutting split ends with craft or kitchen scissors → only sharp hairdressing scissors, which slice the fibre instead of crushing it
- Staying on your old rhythm after bleaching → six to eight weeks, until the ends lie smooth
- Having curls cut wet to a straight length → dry or curl by curl
- Booking by the calendar although your ends are already forking → let the strand check decide
Quick questions
Can I trim my own ends at home?
Yes, for a micro-trim on straight hair without layers. Comb dry hair smooth, split it into two halves, bring each forward over your shoulder and cut straight across with sharp hairdressing scissors, five millimetres at most. In the mirror you can't see layers or a bob line the way they fall at the back, so leave those to your hairdresser.
How often should men with short hair get a cut?
Every three to six weeks; the shorter the cut, the sooner. At three centimetres of hair, one centimetre of growth is a third more, and it shows first at the nape and around the ears.
Is a split-end trimmer worth it between appointments?
Yes, for single stray split ends in long hair. These devices only snip what sticks out of the strand fed through them, and they don't replace cutting the line. Once the blades go blunt, they crush the ends instead of cutting them.
Does a haircut help with hair loss?
No. Hair that falls out comes loose at the root, and no scissors reach that far; whether your hair is breaking or falling out you can tell from the difference between hair breakage and hair loss. Bald, round patches or suddenly far more hair in your brush are for a dermatologist, because the cause then lies beneath the scalp.
For the weeks between two cuts, the hair analysis suggests care that suits your ends and your styling.