Did a bit of hunting, the only thing I could find was a site that listed baked potato without skin as
145 cals
34 carbs
3 protien
and baked potato with skin as
220 cals
34 carbs
5 protein,
of you do the math based on this it would be 17 carbs, and I surely hope that's not right because I have been eating the skins periodically. The only part of the equation missing would be fibre, and I would think there should be a fair amount in the skins, but so far I haven't been able to find anything that tells me how much. Not sure if this helps you or me!!! Will have to keep hunting.