This is the way that Duke does credits as well. (sucks that labs aren't any different from non lab classes but eh whatever) Our advisers sent us an email saying that AMCAS told them:
"Duke students should list their course credits as listed on their transcript and AMCAS will do the conversions."
This means that in the AMCAS application where it says "Credit Hours", you enter 1.0 for a 1 course credit course, 0.5 for a 0.5 for a 0.5 course credit course, etc.
So basically AMCAS converts it. (though I don't know if that is for all schools or just Duke, ask your premed adviser; that is their job)