There are two ways of converting to a faith.
:*Any follower of a [[deity]] can convert other players, provided they have the [[statuette]] of their god, and at least 10 faith.
:*It is also possible to convert by visiting the [[Altar of Three]] on the Chaos or [[Elevation]] servers, or the [[Bone Altar]] on the [[Elevation]] server.
Either way, you must satisfy the requirements of the faith.