Kim, I would imagine that there'd be some carbs in a diet rite, but I don't drink them, so off hand I couldn't give you the exact number. There's a fantastic carb counter tool on this site though; right atop every page in orange highlight under "Low Carb Tools" - it should be listed there. If not, the LC products forum should have some posts on it (being that it is sweetened with splenda it's a popular diet drink among LCers).

Cheers,
Nat