According to CalorieKing, the number of calories in a bagel depends on its size, weight and the ingredients used to make it. Where it is created like bakeries and restaurants also factor in as production methods vary.
Bagel flavors include plain, cinnamon raisin, whole wheat, chocolate chip, blueberry and everything. Calorie counts increase as flavor ingredients increase. For example, CalorieKing states that a plain .9 oz, 2 1/2" diameter mini bagel has 72 calories while a large 4.6 oz, 4 1/5" diameter plain bagel has 360 calories. A large 4.6 oz, 4 1/2" diameter cinnamon raisin bagel has 358 calories.