<prompt> Calories required by one year old child is: September 200892 kcalkgday102 kcalkg day112 kcalkgdayNone  <response>: Ans. None 1100 caloriesday In general, if you want to know how many calories per day a child needs, a good rule of thumb for children up to 5 years of age is to begin with a base of 1,000 calories and add 100 calories for each year of your childs age. 1 year-old would need approximately 1000 100 calories for 1 year, or 1100 caloriesday. A 2 year-old would need 1000 200 calories for 2 years, or 1200 calories day. 