How many calories does a pint of Pepsi?

Too many. Soft drinks are garbage.

There are 100 calories in a serving size of 8 oz/240 g which is about 2/3 of a can.

A whole can of Pepsi has about 135 calories.

Don't drink the stuff, drink water instead and at the end of a year, if you drank a glass of water once a day instead of a can of pepsi, you will have saved yourself from drinking the equivalent of about 5 bags of sugar (which would cause you to gain about 10 pounds of fat in a year)