How many kilojoules should a 13 year old eat a day?
a boy on average should eat around 2200 kilojoules a day.
a girl on average should eat around 2100 kilojoules a day.
on average a 13 year old should eat 2150 kilojoules a day.
The amount of kilojoules a pregnant women should consume all depends on which trimester of pregnancy she is in. If she consumed the appropriate amount of kilojoules before she became pregnant, she would need not to consume extra kilojoules on her first trimester. On her second trimester, she should consume an extra 1400 extra every day. As she moves onto her third trimester, she should start consuming another extra 1900 kilojoules a day.
Adult Males 2500 Calories which is 10 500 kilojoules. Adult Females 2000 Calories which is 8 400 kilojoules. That is for an average lifestyle, it will go up or down depending on how much or little physical activity you do. For more information, see the page link, further down this page, listed under Related Questions.
It depends on your age, height, and weight. Also, the more exercise you do, and the higher your metabolism, the more energy you will burn just doing nothing. For example, a 21 year old female, with a height of 170cms and a weight of about 60 kilos, will burn around 5000 kilojoules a day, just through metabolic processes. Of course, this may differ from person to person, depending on their lifestyle and amount of activity…