How long would your hair be if you never cut it for 18 years?

How Long Would Your Hair Be if You Never Cut It for 18 Years?

The Science Behind Hair Growth

So, you're wondering, what would happen if you stopped cutting your hair for 18 whole years? First things first, let’s get into the science of hair growth. Hair grows from follicles in your scalp, and on average, hair grows about half an inch (1.25 cm) per month. That’s about 6 inches (15 cm) a year. Sounds pretty simple, right?

But hold up—there’s a catch! Not all hair grows at the same rate, and the speed at which it grows can depend on various factors like genetics, diet, health, and age. For example, did you know that people with fine hair tend to have slower hair growth compared to people with thicker strands? So, if you're someone blessed with thick hair, your growth rate might actually be faster than average.

How Long Is 18 Years of Hair Growth?

Okay, let’s do some math here. If your hair grows about 6 inches every year, after 18 years, you could expect it to grow roughly 108 inches—about 9 feet! Can you imagine that? Almost 3 meters of hair! I mean, that’s enough to trip you up while walking around, right?

But hold on—there’s something else to consider. Hair doesn’t just keep growing forever. Every strand of hair goes through growth, rest, and shedding cycles, and this is where things get interesting.

The Growth Cycle: Not All Hair Grows at the Same Rate

This is where it gets a little tricky. While most hair on your head might keep growing, some hair follicles might enter a resting phase or even fall out. Typically, around 85-90% of your hair is in the growing phase, and the rest is either resting or shedding.

I had this conversation just last week with a friend who had been growing his hair out for over a decade. He was convinced that the 9 feet theory applied to him, but after some research, we realized that the growth cycle means he probably wouldn't hit that height in reality. He joked about his "dream of becoming a walking mop," but we both realized that, in truth, his hair would start thinning or naturally falling out at some point.

Will Your Hair Ever Stop Growing?

Ah, the ultimate question—does hair just keep growing and growing? Well, sort of. The truth is, your hair will eventually stop growing at a certain length due to the natural growth cycle. Each hair follicle has a limit, called the "terminal length." This is the maximum length that the hair can grow to before it falls out and is replaced by a new hair strand.

For some, this limit might be a few inches, while others might have hair that grows much longer. It's really down to genetics, how long your hair's growth cycle lasts, and how well you take care of it.

Personal Anecdote: My Own Hair Journey

Funny story—I tried growing my hair out for about two years when I was younger. I didn't cut it at all, just trimmed the ends here and there. After a while, I noticed that my hair was just... not growing any longer. It felt like I had hit a wall. My mom kept telling me to give it time, but eventually, I realized it was because of the terminal length. I had to cut it back to see any real growth again! So, if you're looking for ridiculously long hair after 18 years, it's important to understand that your hair will eventually reach a "max" point. Don’t expect to go from shoulder-length to floor-length overnight!

How to Maximize Hair Growth Over 18 Years

Now, let’s say you're serious about growing your hair out for the long haul (pun intended). What can you do to help your hair grow as long and healthy as possible?

1. Eat a Balanced Diet: Your hair needs proper nutrition to grow strong and healthy. Proteins, vitamins (like Biotin), and minerals (such as zinc and iron) are essential. I remember trying every hair supplement on the market, but I quickly realized that a balanced diet, with plenty of veggies and lean proteins, does wonders.

2. Minimize Hair Damage: Heat styling, excessive brushing, or tight hairstyles can weaken your hair. I know it sounds boring, but it works! After giving up my straightener for a few months, I noticed my hair felt thicker and grew faster.

3. Be Patient: Growth takes time—lots of it. And 18 years? Well, that's a long time to wait. But, hey, your patience will be rewarded with a glorious mane, hopefully!

4. Regular Maintenance: You may be surprised, but getting the occasional trim actually helps your hair grow better! Removing split ends ensures that the growth you’re getting isn’t getting broken down by damage. A good trim every 6-8 months will keep things healthy and prevent major setbacks.

Conclusion: Could Your Hair Reach 9 Feet in 18 Years?

So, would your hair really grow 9 feet in 18 years? Technically, yes, that’s the ideal maximum if your hair grows at an average rate and you have no setbacks. But let’s be real—there are a lot of factors at play that could slow down or limit the growth. Genetics, hair cycles, and damage all play their part.

And let’s not forget that maintaining hair that long would require a lot of care and attention. After all, we're talking about years—decades!—of hair care, patience, and maintenance.

Would you want your hair to reach the floor, or would you settle for something more manageable, like waist-length? Whatever your goal, remember that hair growth is a journey—and a long one at that!

Is 165 cm normal for a 15 year old?

The predicted height for a female, based on your parents heights, is 155 to 165cm. Most 15 year old girls are nearly done growing. I was too. It's a very normal height for a girl.

Is 160 cm too tall for a 12 year old?

How Tall Should a 12 Year Old Be? We can only speak to national average heights here in North America, whereby, a 12 year old girl would be between 137 cm to 162 cm tall (4-1/2 to 5-1/3 feet). A 12 year old boy should be between 137 cm to 160 cm tall (4-1/2 to 5-1/4 feet).

How tall is a average 15 year old?

Average Height to Weight for Teenage Boys - 13 to 20 Years

How to get taller at 18?

Staying physically active is even more essential from childhood to grow and improve overall health. But taking it up even in adulthood can help you add a few inches to your height. Strength-building exercises, yoga, jumping rope, and biking all can help to increase your flexibility and grow a few inches taller.

Is 5.7 a good height for a 15 year old boy?

Generally speaking, the average height for 15 year olds girls is 62.9 inches (or 159.7 cm). On the other hand, teen boys at the age of 15 have a much higher average height, which is 67.0 inches (or 170.1 cm).

Can you grow between 16 and 18?

Most girls stop growing taller by age 14 or 15. However, after their early teenage growth spurt, boys continue gaining height at a gradual pace until around 18. Note that some kids will stop growing earlier and others may keep growing a year or two more.

Can you grow 1 cm after 17?

Even with a healthy diet, most people's height won't increase after age 18 to 20. The graph below shows the rate of growth from birth to age 20. As you can see, the growth lines fall to zero between ages 18 and 20 ( 7 , 8 ). The reason why your height stops increasing is your bones, specifically your growth plates.