Taking calories depends upon weight of that person.
better to avoid children to follow this chart.
growing up children no need to follow calories chart. they should concentrate on physical fitness. Taking healthy diet and doing physical exercises makes you healthy and strong person.
If you want to lose weight, you should take between 1000-1500 calorie per a day (dont take below 1000 cal,you will suffers from unhealthy problems.)
under 18 years active person have to take 2000-2500 calories per a day.
between 20-50 years active persons have to take 2000-2200 calories.men can take 3000 calories if they are active.
according to BMI(body mass index) calcutations multiply your weight with 24,then coming result is you have to take that number of calories.( if you are like to maintain same weight).
suppose your weight is 70kg .70*24=1680 calories daily you have to take to maintain present weight.
if you want to weight loss you have to less 500 from 1680 (1680-500=1180).if you take 1180 calories food daily, you will loss weight slowly.
if you want to gain weight then add 500 to 1680 (1680+500=2180).you have to take more than 2180 calorie food then you will gain weight.
Diet Plan shows you how much food have to take according calorie concept.