How much should a 14-year-old girl eat every day?

A moderately active 14-year-old girl should consume approximately 2,000 calories per day, according to the Office on Women's Health. The amount of calories necessary for a 14-year-old girl may vary depending on her activity level, height and weight.

It is important to eat a variety of foods each day. The majority of the calories should come from whole grains, fruits, vegetables, dairy and lean proteins. Fruits and vegetables should be eaten the most to obtain an optimal amount of vitamins and minerals. The Office on Women's Health recommends that girls eat 1 ½ cups of fruit and 2 ½ cups of vegetables every day.