Here are a few ways to answer, depending on how specific you want to be:
Formal:
* Me levanto a las [time]. (I wake up at [time].) For example, "Me levanto a las siete de la mañana." (I wake up at seven in the morning.)
* Generalmente me levanto a las [time]. (Generally I wake up at [time].) This is a good option if your wake-up time varies slightly.
Informal:
* Me levanto [time] más o menos. (I wake up around [time].)
* A las [time], más o menos. (Around [time].)
* Depende. (It depends.) You can use this if your wake-up time is very inconsistent.
Remember:
* You can use the 24-hour clock or the AM/PM system.
* You can add context like "de la mañana" (in the morning), "de la tarde" (in the afternoon), or "de la noche" (at night).
Let me know if you have any other questions!