In this section, calories in breads and cakes starting with the letter B! So for calories in bagels this is th eplace. Our calorie counter and nutritional information could help you to watch your eating. Bagels are a traditional Jewish roll and are made from kosher unleavened bread and have become popular worldwide, as a breakfast or lunchtime food, often served with smoked salmon, lemon juice and cream cheese. Look up the number of calories in bagels, and any other breads and cakes that start with B, right here.