Fruit is a great snack, dessert, or addition to just about any meal. However, if you’re on a diet and counting calories, you might be asking yourself, “how many calories are in fruit?” Without further ado, here's a list of calories in the most popular fruits. Unless otherwise specified, these are the number of calories in each whole piece of fruit. For example, there are 3 calories in one grape, 65 calories in one orange, 107 calories in a banana, etc.