convert from

convert from (something)

1. To leave one religion in order to follow another. I converted from Catholicism to Judaism in preparation for my wedding.2. To change or shift from one thing into another. Did she really convert from that shy kid into a punk rock singer?See also: convert

convert from something (into something)

 and convert (from something) (in)to somethingto change from one thing into another. We converted from oil to natural gas to heat our house. I had hoped he would convert from an impatient youth into a relaxed gentleman. He did not.See also: convert