On most diets I have been on calories was talked about, you can have xxx number of calories each day. But are calories as important as some believe?
How are calories calculated?
There are a few ways to calculate calories. The original way was to put food in a container which is put into water, electrical current is put through the container with the food until it burned and the rate the temperature of the water increases creates the calorie amount. The 2nd method is to take averages for the nutrients within the food to create a total number of calories.
Nutrition?

Compare a chocolate bar with an egg salad sandwich of the same calorie amount.
Which is better fuel in the long run for your body?
Which gives you more nutritional value?
The egg salad sandwich.
Things may have the same calories but they are probably not going to be as good fuel for your body.
When deciding on what you are going to eat think not about calories but more about nutritional value.