The amount of water in the human body ranges from 50-75%. The average adult human body is 50-65% water, averaging around 57-60%. The percentage of water in infants is much higher, typically around 75-78% water, dropping to 65% by one year of age.
Here are some facts about water: Babies and children have a higher percentage of water than adults. When babies are born, they are about 78 percent water, but this falls to 65 percent by the age of 1 year. Fatty tissue has less water than lean tissue.
Infants’ and children’s higher body water content, along with their higher metabolic rates and increased body surface area to mass index, contribute to their higher turnover of fluids and solute.
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. This loss seems then to increase even later after 70 years.
Moreover, due to difference in body composition, children have higher body water content relative to body mass than adults. On average, water represents 75% of the body mass in infants in the first 6 months of life (Altman, 1961).
According to Dr. Jeffrey Utz, Neuroscience, pediatrics, Allegheny University, different people have different percentages of their bodies made up of water. Babies have the most, being born at about 78%. By one year of age, that amount drops to about 65%.
In terms of gender, men require more water than women because they generally have a higher energy expenditure and less body fat. There are differences between the two genders in the proportion of body weight made up of water. On average 60% of male body weight is water and in women, it is 55%.
In lean healthy adult men, the total body water is about 60% (60–67%) of the total body weight; it is usually slightly lower in women (52-55%). The exact percentage of fluid relative to body weight is inversely proportional to the percentage of body fat.
The average adult human body is 50-65% water, averaging around 57-60%. The percentage of water in infants is much higher, typically around 75-78% water, dropping to 65% by one year of age.
Two-thirds of our bodies consist of water. In total, it makes up 99% of all molecules in our bodies. And still, there’s so much we don’t know. And that we should know to find the technological innovations of the future.
Your body water percentage is the amount of water in your body, expressed as a percentage of your total weight. Water is essential to your body’s function: your brain and heart, for example, are 73% water, and your lungs are 83% water.
Body water percentage charts The decreasing water percentage through the years is due in large part to having more body fat and less fat-free mass as you age. Fatty tissue contains less water than lean tissue, so your weight and body composition affect the percentage of water in your body.
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.
Body Water Distribution in Children Body water content changes significantly with age in children. Total body water (TBW) is high in the fetus and preterm infant. During early fetal life, TBW represents 90% of total body weight, with 65% being in the extracellular fluid (ECF) compartment.
In the early weeks of pregnancy, the amniotic fluid is mostly water that comes from your body. After about 20 weeks of pregnancy, your baby’s urine makes up most of the fluid.