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The 411 On How Much Hair Weighs

October 15, 2022


Verna Meachum

Photo of hair weighed on a scale - the 411 on how much hair weighs

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With extensive experience in the beauty industry, I specialize in writing for curly hair care brands, websites, and magazines.

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I also partner with a friend who holds a Ph.D. in chemistry and works as an R&D Chemist, ensuring our content is scientifically accurate and help us navigate through the misinformation around curly hair care. 

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Last Updated on March 10, 2023 by Verna Meachum

Are you wondering how much hair weighs? Well, wonder no more! We have the 411 on everything related to hair weight.

There are many different factors that can influence how heavy your hair truly is, such as length and thickness. But the short answer to how much hair weighs is- not very much. On average, hair typically weighs between 50 and 100 grams, which is about the size of a small apple.

In addition to length and thickness, other factors that can affect how much hair weighs include the type of hair you have (i.e. fine, thick, etc.), how healthy and hydrated your hair is, and how much product you use in your hair.

Overall, it’s safe to say that hair is quite lightweight.

The Hierarchy of Human Hair

Hair structure photo for the article on the 411 on how much hair weighs

Human hair is arranged in a hierarchy. The outer layer, known as the cuticle, contains an inner cortex with many small keratin fibres measuring around 5 micrometers in diameter and 100 micrometers long. These are linked together by chemical bonds.

Each of these fibres consists of smaller threads, 0.2–0.4 μm in diameter, which are made up of 7.5 nm intermediate filaments.

Average Weight of a Strand of Hair

On average, a single strand of hair typically weighs between 0.000015 ounces, or about 0.0004 grams.

This is much lighter than many people might expect, particularly given how strong and durable our hair can be.

The weight of your hair will vary significantly on its length and porosity. Discussing the density of hair or keratin, which is the mass per unit area is more appropriate in this context as it provides a better indication of how much hair truly weighs.

So how does our hair manage to be so light while still offering us protection and support? The answer lies in how our hair is structured.

What Makes Hair Strong?

Video credit: ScienceOnTheBrain

What makes hair strong is all thanks to its unique composition and structure.

Hair is made up of thousands of individual strands, which are held together by a protein called keratin. This protein helps to protect our skin and absorb shock, making it a crucial part of how we move and function in the world.

Human hair is quite strong, with a comparable tensile strength to steel. In fact, you could carry a person using only 500-1000 human hairs!

Weight of All the Hair On Your Head

The total weight of all the hair on your head can also vary depending on several factors, such as how long and thick your hair is. However, on average, a healthy person has between 80,000 to 120,000 hairs on their head.

So while your hair might seem heavy at times, it’s actually incredibly light and flexible. And with so many important roles to play in our body, it’s an essential part of who we are.

How much does hair impact weight?

Young African American woman isolated on white background with weighing machine for article on the 411 on how much hair weighs

While hair itself is incredibly light, there is some evidence to suggest that it can impact weight in other ways.

A person with long, thick hair may weigh more than someone with thin, short hair. On the other hand, someone whose hair only reaches their shoulders could shave all over their body and not see a significant weight change.

Overall, however, the role of hair in our overall weight remains a topic of much debate. Some experts believe that it may play a small role, while others argue that its impact is minimal at best.

Despite this uncertainty, there is no denying the importance of hair in our lives and how much we rely on it to stay healthy and strong.

What about race and hair weight?

The three primary factors that affect hair are texture, thickness, and color. However, it is worth noting that all ethnicities have hair that behaves in the same way. For example, generally speaking thin hair weighs less than thick hair.

Some studies have found that people with African descent may have slightly thicker hair than those with European or Asian descent. However, the overall weight of hair, regardless of race or ethnicity, is relatively small and does not have a significant impact on overall weight.

At the end of the day, we should all appreciate how much our hair contributes to who we are. Whether it’s how we style it, how we treat it, or how much it weighs, our hair is a vital part of who we are.

Factors to Consider

The weight of your hair may not seem like something worth considering, but it can actually have a significant effect on you.

  • Your hair weight will not add more than a few ounces to your overall body weight.
  • Hair is not a living thing–it’s only dead cells made of protein.
  • The more hydrated you are, the heavier your hair will be. Hair retains water.
  • If you have long hair, it is likely to be heavier.
  • Factors like thickness, length, and the products you apply to your hair can all contribute to how much it weighs.

How Much Does Hair Weigh?: Wet vs Dry Hair

Another factor that can impact how much hair weighs is how wet or dry it is. For example, a single strand of dry hair typically weighs more than a strand of wet hair.

This is because when hair becomes wet, it swells (by approximately 15%) and absorbs water, which adds additional weight to the strand.

With wet hair weighing more due to absorbed water, dry hair will always weigh less.


While we may not think about how our hair weighs in on a daily basis, this simple fact can help us to better understand how our bodies work and how we can take care of our hair to keep it healthy and strong.

At most, your hair weight will not weight more than a pound – unless it’s very long. Ultimately, how much your hair weighs is just one small factor in how our bodies work.

So the next time you’re standing in front of the mirror and wondering how much your hair weighs, remember that it’s a lot less than you might think.


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