Technically it's possible to convert them, but a lot depends on just how meager the amounts are. If they are too small, then you probably can't transfer them, since most transfers require a minimum amount of miles to be moved. Also note than you may loose some miles along the way too.
The easiest way to find out if you can transfer, and how to do so, is to use FlyerTalk's Mileage Converter program.
