Well, that depends on what you eat.
400 calories from your breakfast
There are about 500 calories in one serving (4 links) of breakfast sausage.
There are 130 calories in a packet of Carnation breakfast drink mix.
480 calories
3,000 calories
It does not matter what proportion of daily calories come from breakfast.
540 calories.
269
699
random question
The number of calories in cereal bars varies. A Special K Bliss Bar has 90 calories, an Atkins breakfast bar has 160 calories, and Quaker breakfast bar has 130 calories.
It depends on what you eat. It varies so much, it's impossible to tell how many calories are just in 'breakfast.'