Body water percentage chart
|Age 12–18 years||Age 51 years and older|
|Male||Average: 59% Range: 52–66%||Average: 56% Range: 47–67%|
|Female||Average: 56% Range: 49–63%||Average: 47% Range: 39–57%|
Body water is the amount of water content found in your body. Up to 60% of the human body contains water. Almost every cell in your body contains water: body water makes up 79% of your muscles, 73% of your brain, and even 31% of your bones. Overall your body weight can be 45-65% water.
Body Water Compartments: Extra- and Intracellular Total body water manifests a linear decrease with aging, until it constitutes less than 50% of body weight in very old individuals. There is thus a mean decrease of 0.3 liter in total body water during the period of life from adulthood to old age.
Up to 60% of the human adult body is water. According to H.H. Mitchell, Journal of Biological Chemistry 158, the brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water, muscles and kidneys are 79%, and even the bones are watery: 31%.
The normal range for adult women varies between 45% and 60%. For men, the ideal body water percentage fluctuates between 50% and 65% of the total body. In babies, that number is much higher. The norm is considered to be between 75% and 78%, dropping to 65% by one year of age.
Experts generally recommend that older adults consume at least 1.7 liters of fluid per 24 hours. This corresponds to 57.5 fluid ounces, or 7.1 cups.
A formula used to calculate fluid requirements for older people is: U 100 mL fluid per kg body weight for the first 10 kg U 50 mL fluid per kg for the next 10 kg U 15 mL fluid per kg for each kg after 20 kg.
Total body water (TBW) volume is reported to decrease with age, but much of the published data are 20 to almost 50 years old and are cross-sectional. Proper interpretation of clinical levels of TBW and trends with age necessitates the availability of current longitudinal data from healthy individuals.
Fast facts on water weight: Water normally makes up 50 to 60 percent of an adult’s total body weight. Any extra water being held in the body is referred to as “water weight.” When water builds up in the body, it can cause bloating and puffiness, especially in the abdomen, legs, and arms.
The easy way to calculate total body water is simply to multiply 0.6 times your weight in kilograms, since roughly 2/3 of your body weight is water.
It is used for transporting food materials in the body, and it happens to be where a majority of the biochemical reactions occur. For the very obese, we see water representing around 45% of total body weight, and then up to 70% in the more lean people. The average is going to be around 60% in the general person.
60% of body weight is made up of water.