A burger has more calories than a baked potato. A pepperoni pizza slice can have double the calories of a margherita one.
Most restaurants these days offer menus that have information about calories associated with each dish. It is important to check the information prior to ordering your food. You can also swap unhealthy food with healthier alternatives. For example, you can swap a beef lasagne for a vegetable lasagne or strawberry ice cream for a strawberry sorbet.