Talk:Spells (Baldur's Gate)/@comment-107.9.217.77-20140323212551/@comment-106.185.27.253-20190216175654

For mages the formula to figure out what level you need to be to cast the spell is 2*(spell level)-1. So a first level mage is 2*1-1=1, but a 2nd level spell is 2*2-1=3. In original AD&D this formula works all the way for 9th level spells (2*9-1=17), but from what I've seen in BG EE, it looks like there is a change around level 11/12 (this is according to some wikis I've seen...I've not played all the way through the EE versions yet).

For a sorcerer, its twice the spell level.