How Much Does Hair Weigh? A Fascinating Look Into Hair Weight

How much does hair weigh? In this article, Ivirgo Hair Factory will go with you to find the answer to the question about hair weight and learn about problems related to your hair. Join me with this exciting information right here!

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How Much Does Hair Weigh?

The hair weight is 0.00064 ounces/inch. Accordingly, you can calculate hair weight from a single hair to the entire hair on your head. However, many factors change hair weight, including temperature and humidity.

How heavy is hair?
How heavy is hair?

One Strand Of Hair

Scientists made sophisticated measurements and concluded that a 1-inch-long hair has a weight ranging from 0.000013 to 0.000021 ounces. In 1 square inch, you would have hair weighing about 0.0037 to 0.0074 ounces.

Each inch will weigh about 0.00064 ounces. From this measurement, you can easily calculate 6 inches weighing from 0.000076 to 0.00013 ounces.

This weight also means that you will need between 7900 and 13000 hairs to have 1 ounce of hair mass.

All Your Hair Weight

You can work out the weight of the entire hair on your head from the weight per inch. You need to estimate each strand’s average length to determine its importance. Then, multiply this weight by the number of hairs to get the result.

According to scientific estimates, a person has an average of 80000 to 120000 hairs on his head. Many factors affect the amount of hair on your scalp. For example, Asians often have thick hair with more strands.

By applying the multiplication formula, you’ll find that your entire hair’s weight falls between 1 and 2.2 ounces. The longer and thicker your hair is, the more weight it will put on your scalp and the more pressure it will put on your scalp.

Wet Hair And Dry Hair

Humidity can also affect hair weight. Wet hair will be heavier than dry hair because it is full of water. You may be surprised to learn that your hair can absorb moisture and swell up to 15% more than its standard size.

In addition, on a hair bundle, water is absorbed not only into each hair but also between the gaps. This moisture is what makes wet hair heavier than dry hair.

After you wash your hair soaked in water, your weight increases by about 1 ounce. The weight gain can be up to 2 ounces for people with long hair.

Yet, if your hair is in an extremely dry condition due to loss of moisture, the hair weight will drop a bit. This phenomenon is common in hair that has undergone many styling treatments with chemicals and heat, or bleached hair.

Factors Related To Hair Weight

Factors related to hair weight
Factors related to hair weight

Many factors change your hair weight. Among them, the most critical factors are hair size, quantity, and health.

Hair Size

Hair begins to grow from the hair follicles on your scalp. The dead cells are gradually pushed out from the root to lengthen the hair. And each strand has an axis that makes up its length and surrounding keratin fragments.

Hair shafts can vary from person to person. People with thicker hairs with more extensive hair shafts will have heavier hair than others.

However, since this difference is so tiny, you will only notice it through measurements if the experiments are highly sophisticated.

Hair Quantity

An interesting finding that scientists have made is that hair color also affects the amount of hair on your head. According to this study, natural blondes are usually the thickest, while redheads have the smallest strands.

Accordingly, based on different natural hair colors, you will get the average number of hairs growing on your head:

  • Blonde: About 150,000 strands

  • Black hair: About 110,000 strands

  • Red hair: About 100,000 strands

Based on your hair color, you can multiply the weight of each hair by the total number of strands to find an approximate number that represents the weight of your entire hair.

Hair Health

What is hair health?
What is hair health?

Finally, the hair’s health also affects the entire hair’s overall weight.

If your hair has the necessary moisture and is very strong, it will weigh more than frizzy and chronically dry inches. In contrast, pathological alopecia will reduce the hair on the head and its overall weight.

If your head has been dirty and oily for a long time, your hair will be significantly heavier.

The dyed hair has a layer of dye on its surface, so the weight of the hair will also increase. However, this increase is so slight that it is almost impossible to perceive or detect through conventional measurements.

How To Reduce The Weight Of Your Hair?

Some people with long and thick hair often feel their head is heavy because of their long and wide hair. The easiest and simplest way at this time to reduce its weight is to cut the hair.

If you want to reduce the weight of each curl, you can use hairdressing methods such as ruffles or straightening curls.

Thinning your hair is also something you can do to have a beautiful hairstyle that is full of life and puts less pressure on the head and neck.

Washing and cleaning your hair regularly and avoiding greasy and dandruff-prone hair is also an excellent way to make your head feel lighter.

You should also avoid chemical beauty products high in molecular weight and stick to the hair shaft, as they can make your hair fall flat and heavier than usual.

FAQs related How Much Does Hair Weigh

Q: How much does an average strand of hair weigh?

An average strand of human hair typically weighs about 0.62 milligrams (mg). Keep in mind that the weight can vary depending on factors like hair type and individual differences.

Q: How much does a full head of hair weigh?

The weight of a full head of hair varies greatly among individuals, depending on factors such as hair length, density, and thickness. On average, a full head of hair can weigh anywhere from 10 to 100 grams (0.35 to 3.5 ounces).

Q: Do different hair types have different weights?

Yes, different hair types have varying weights. For example, coarse or thick hair tends to weigh more than fine or thin hair. Curly hair may also weigh more due to its natural structure.

Q: How much does hair weigh when wet?

When hair is wet, it can absorb water, which increases its weight. On average, hair can absorb up to 30% of its weight in water. So, if your hair weighs 100 grams when dry, it might weigh around 130 grams when wet.

Q: Does hair weight change with length?

Yes, hair weight can change with length. Longer hair is generally heavier than shorter hair because it contains more strands and, therefore, more overall mass.

Q: Can hair weight be a factor in hair loss?

Hair weight itself is not a direct factor in hair loss. Hair loss is typically caused by factors like genetics, hormonal imbalances, medical conditions, and certain medications. However, excessive styling and treatments that put too much stress on the hair can lead to damage and breakage, making the hair appear thinner and lighter.

Q: How can I measure the weight of my hair?

Measuring the weight of your entire head of hair accurately is challenging without specialized equipment. However, you can estimate the weight of a small sample by cutting a few strands, placing them on a sensitive digital scale, and averaging the results to get an idea of the weight per strand.

Q: Can hair products affect its weight?

Hair products like shampoos, conditioners, and styling products can add a small amount of weight to your hair temporarily due to residue and moisture retention. However, this weight increase is usually negligible.

Q: How does hair color affect its weight?

The color of your hair does not significantly impact its weight. The main factors that influence hair weight are its thickness, length, and moisture content.

Q: Does hair weight contribute to the overall weight of the body?

The weight of your hair is generally not a significant contributor to your overall body weight. Even for individuals with long, thick hair, the combined weight of their hair is usually a tiny fraction of their total body weight and is not considered when determining overall body mass.


Through this article, I hope you have given yourself a satisfactory answer to the question, how much does hair weigh? The weight per hair inch is about 0.00064 ounces or about 1 to 2.2 ounces for the entire hair quantity on your head. Since this weight is not too large, the haircut will not significantly affect your overall body weight. Thank you for reading!

Hair Care Expert at Ivirgo Hair | + posts

I am Thomas Taw, the CEO of CITIZENSNIPS. I have experience in hair product development and chemical research, as well as sustainable resource engineering. In 2009, I co-created Sunsilk, one of the world's leading haircare brands. More recently, I was the CEO of SMOKINGPANDA LTD. I am a professional with a strong track record in delivering tangible results.

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