A 13-year-old boy typically needs around 2,000-2,400 calories per day, while a girl of the same age needs about 1,800-2,200 calories. That's like eating 5-6 meals per day, including snacks! But remember, these are just rough estimates, and your individual calorie needs may vary.
Now, you might be thinking, what affects these calorie needs? Well, physical activity plays a huge role! If you're super active, like a sports star, you'll need more calories to fuel your body. On the other hand, if you're more of a couch potato, you'll need fewer calories.