Formal:
* À quelle heure vous levez-vous ? (This is the most common and formal way to ask.)
* À quelle heure vous réveillez-vous ? (This focuses on the act of waking up.)
Informal:
* À quelle heure tu te lèves ? (This is the informal version of the first option.)
* À quelle heure tu te réveilles ? (This is the informal version of the second option.)
More casual:
* Tu te lèves à quelle heure ? (This is a very common and informal way to ask.)
* Quel est ton heure de réveil ? (This literally asks "What is your wake-up time?")
Remember to use the correct verb conjugation depending on the pronoun:
* vous for formal "you"
* tu for informal "you"
* je for "I"
For example:
* Je me lève à 7 heures. (I get up at 7 o'clock.)
* Tu te lèves à quelle heure ? (What time do you get up?)
* À quelle heure vous vous levez ? (What time do you get up? - formal)
The best way to choose the right phrase is to consider the context and your relationship with the person you are talking to.