The calorific content of bread depends on many factors, such as the type and levels of grains and seeds it contains, how refined the flour is, the quantity of water, and any added ingredients, such as nuts or dried fruits. In general, the calorie content of bread ranges between approximately 240 and 260 kcal per 100 grams of bread. This means, on average, there will be 70-80 kcal per one slice of bread (30 g).