Hair can typically grow to a length of between 40 – 80cm (16 – 32inches). There are exceptions to this.
The maximum length hair can grow can be different for everyone and is called its "terminal length". The terminal length is the length of hair you would have if you grow your hair and never cut it.
The world record for the longest hair belongs to Xie Qiuping and was measured to be 18 feet 5 inches or 5.6 meters long.
Get Expert Hair Analysis and Help
If you would like to discover how well you are looking after your hair, your hair type, or hair porosity, then check out one of HairKnowHow's hair analyses below.
Contact the HairKnowHow Team if you have any questions.
Knowing your hair porosity is one of the keys to unlocking your hair's beauty and health - so your hair can look its best.
Healthy, beautiful hair requires using the right products and haircare practices for your hair porosity. Using the right products will save money and significantly improve your hair's texture, bounce, and colour, reducing frizz and split ends.
HairKnowHow's Porosity Test brings porosity measurement directly to your home and is simple to use.
Discover your hair porosity and receive expert advice to help you get the beautiful hair you deserve.
Healthy hair is beautiful hair.
With our Hair Porosity Plus we also include amazing electron microscopy microscopy images of your hair! See your hair in a new way!
We ship worldwide, including the US and UK. You should receive your kit within 3-5 working days, depending on your location.
Knowing your hair type is the key to unlocking your hair's beauty and health.
Getting healthy, beautiful hair requires using the right products and haircare practices. Using the right products will save money and significantly improve your hair's texture, bounce, and colour, reducing frizz and split ends.
Also, if you are looking for specially formulated haircare products, including shampoos and conditioners, then knowing your hair type and fibre diameter is vitally important.
Measuring your hair type is very tricky are requires a lot of guesswork.
HairKnowHow directly measures the texture and thickness of your fibres so you can be sure that your hair type is accurate.
Healthy hair is beautiful hair.
With our Hair Type Plus we also include amazing electron microscopy microscopy images of your hair! See your hair in a new way!
We ship worldwide, including the US and UK. You should receive your kit within 3-5 working days, depending on your location.
Getting The Complete Hair Analysis is the simple way to discover how healthy your hair really is and, importantly, to get the right products and advice for your hair. Only then can you unleash your hair’s full beauty and health potential.
Our tests uncover and quantify hidden heat damage, increasing porosity, cuticle damage, hair abnormalities, and much more. This hidden damage can lead to hair shortening, frizz, and breakage, including dull, hard-to-manage hair.
So before rushing out to buy those products you think you need for your hair, get The Complete Hair Analysis first!
Reveal your hair’s secrets and unleash its full potential. Get the hair you always wanted with the right products and haircare advice from Dr Palmer.
Healthy hair is beautiful hair.
We ship worldwide, including the US and UK. You should receive your kit within 3-5 working days, depending on your location.