how much does the human body grow in a day?

Answer 1

The answer depends on many different factors: diet, activity level, stress level, heredity and many other difficult-to-measure factors. Perhaps the most important factor, however, is age.

The fastest relative weight gain in humans (and other mammals) occurs during infancy. A healthy infant grows a half-ounce to an ounce every day during its first month, which typically represents less than 1% of total body size. Even at this age, there is a great deal of variation in growth rates.

The second fastest growth rate occurs during adolescence. During an adolescent growth spurt, boys and girls grow by an average of 4.1 and 3.5 inches per year, respectively. If you simply divide that average by 365, you come up with 11 thousandths of an inch per day for boys and 9 thousandths of an inch per day for girls. It should be noted that this is only an average, and that growth almost certainly does not occur at a perfectly even rate from day to day. As for weight gain in adolescence, too many factors play a role for any estimate to have any meaning.

In adulthood, growth slows down to such a rate that any daily growth is extremely negligible.

Answer 2

it doesn't, in fact it actually shrinks during the day normally, as the discs in your vertebra compress. you regain that when you sleep at night. If I remember right, it's up to 3cm that you lose during the day.

Answer 3

it depends on age and lifestyle