adults need calories per day
Recommended daily calorie intakes. Recommended daily calorie intakes vary across the world. According to the National Health Service (NHS), UK, the average male adult needs approximately 2,500 calories per day to keep his weight constant, while the average adult female needs 2,000.
1. Young adults generally require higher amounts of calorie intakes than older adults. A female adult between the ages of 19 to 30 year will require about 1600 to 2200 calories while a man will require 2000 to 3000 calories per day.