Question: how many calories a day should a 20 year old female eat?
Answer: From five to 10 years old, the Department of Health recommends sedentary girls should eat around 1,400 calories a day. By the age of 20 they should eat 2,000 calories a day, with this falling to 1,800 between the ages of 25 and 50. Between 50 and 80, women should eat 1,600 calories a day unless they start exercising.