Water Percentage of Human Body

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Water is essential for the functioning of the human body. It makes up between 40-60% of an individual’s total body weight and plays important role in every system in our body. Some organs and tissues, like the brain and muscles, are made up of more than 75% water.

Other tissues may contain less water, but even a small decrease can affect how your cells and organs function. In this article, we will take a look at the water percentage in human organs, female bodies, male bodies, and children’s bodies to better understand why it is so important to stay hydrated.

Water Percentage of Human Organs

The amount of water found in different organs varies significantly depending on where it is located. For example, the heart contains 73% water while bones contain 22%. Here are some average percentages of water found in different organs:

  • Heart: 73%
  • Brain & Nervous System: 75%
  • Kidneys: 79%
  • Liver: 74%
  • Muscles & Skin: 64-68%
  • Bones: 22%
  • Lungs: 83%

It is important to note that these percentages may vary slightly from person to person due to individual differences in size and composition.

Water Percentage In Female Body

The average water percentage for a female body is about 52%-65%. This varies depending on age, height, weight, activity level, diet, and lifestyle habits. Generally speaking though, females contain more bodily fluids than males as they have a higher concentration of fat tissue which holds more water than muscle mass does.

Water Percentage In Male Body

The average water percentage for a male body is about 45%-60%. This also varies depending on age, height, weight, activity level, diet and lifestyle habits but generally males have less bodily fluids than females because they have more muscle mass than fat tissue which holds less of it.

Water Percentage In Child’s Body

Children tend to have higher levels of bodily fluids than adults because their bodies are still growing rapidly. The average water percentage for children ranges from 55%-75%. Children should make sure to drink enough fluids each day since their bodies need extra hydration during periods of rapid growth.

In conclusion, staying hydrated is essential for a healthy functioning body. The amount of water an individual contains varies by gender and age but generally speaking averages around 45%-75%. Therefore it is important to drink enough fluids each day to stay hydrated and maintain optimal health!

Water Percentage of Animal Bodies Compared to Humans

The body of every living organism is made up of water, with the percentage varying greatly depending on the species. Most mammals are composed of between 60- 70% water, with humans being about 65%. Humans often have a higher water percentage compared to other animals due to the way their bodies store water.

In contrast, amphibians have lower amounts of body water and typically have a moisture content of up to 80%. Some other animals including insects, avian species and reptiles have even lower amounts of body moisture ranging from 45-60%.

Importance of Water for the Human Body

Water is essential for life as it is used by our bodies in countless ways. It accounts for 60-70% of our body weight and can be found in every single cell and organ. Water helps regulate our temperature, helps provide structure to cells and tissues, transports minerals and vitamins throughout our bodies, lubricates joints, and assists with digestion and elimination of waste products such as urine and feces.

Without an adequate supply of water, the human body cannot function properly.

Weight Of Water In The Human Body

The average human adult has about 10 liters (2.2 US gal) spread throughout his or her body. Of this amount, about 2 liters are inside cells called intracellular fluid (ICF), and another 2 liters inside spaces between cells called interstitial fluid (IF).

The remaining 6 liters are found in various organs such as the bladder, intestines, stomach, blood vessels, and skin where it helps cushion them against injury or infection. Together these fluids make up around 60% of an adult’s total body weight which is why drinking enough fluids is essential for maintaining health.

Water Drinking and Weight Loss

The importance of staying hydrated has been known to assist with weight-loss goals. Hydration helps to fill you up without loading up on additional calories. Drinking sufficient amounts of water helps increase metabolism while reducing appetite. Some studies have shown that drinking up to 0.5 liters (17 ounces) of water may increase metabolism by 24-30% within one hour, burning an additional 100 calories in the process.

In addition, those who drank more water had seen a decrease in their caloric consumption throughout the day by about 200 calories per day.

Optimum Percentage of Water In The Body

Generally speaking, researchers suggest that a human body should contain around 55-65% of total body weight as water – a number that may vary depending on age and gender. This number may be split into two categories: intra-cellular fluids (fluids inside cells) which make up around 40%, and extracellular fluids (fluids outside cells) which represent 15% to nearly 20%.

In regards to an average adult body, it is estimated that these percentages are rough:

  • Intra-Cellular Fluid: 40%
  • Extracellular Fluid: 20%
  • Skeletal Muscle: 70%
  • Adipose Tissue (Fat): 10-15%
  • Bone: 10-15%.

It is important to note that as a person ages, their percentage of total body fluid decreases significantly due to reduced skeletal muscle mass and increased adipose tissue levels. This is why elderly populations are at an increased risk for dehydration due to their greater difficulty in perceiving thirst sensations or recognizing early signs or symptoms from dehydration or low fluid intake.


From a health perspective, it’s important for individuals of all ages and genders should focus on keeping their bodies hydrated with sufficient fluids throughout the day — especially during activity or exercise when higher levels of fluid will be lost through sweat losses.

Keeping your body hydrated provides numerous beneficial effects, such as increasing alertness and aiding in weight loss endeavors. Knowing what percentage your body composition should be with regards to total fluid percentage can help ensure you’re adequately hydrated while also performing at your peak performance level within any given environment or activity level.


This is George, the Aquaman, editor at AquaMantra. I'm a water quality analyst by profession, and used to work at one of the largest water bottler company.
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