Batman’s age varies across different comic book timelines and adaptations, but generally he is portrayed as starting his career as Batman at around 25-26 years old. Throughout many stories, he is often depicted as being in his early to mid-30s during his key years as Batman. Some sources suggest he is about 40 years old in more recent storylines, and his age can range up to the mid-40s depending on the era or version of the character. More specifically:
- In the DC Animated Universe, Batman is roughly in his early to mid-30s during key events and can be estimated to have been born around 1961 to 1963 based on certain story arcs.
- In the DC comic continuity, Bruce Wayne becomes Batman at age 26, with timelines placing him in his late 30s to early 40s during significant story arcs like "Death and the Maidens" and "Hush".
- Frank Miller’s "The Dark Knight Returns" places an older Bruce Wayne around age 51 to 54, as it occurs decades after he began as Batman.
- The general consensus in DC comics is that Bruce Wayne becomes Batman in his mid-20s and ages through his 30s and 40s during most stories.
Therefore, Batman is often depicted as starting his crime-fighting career at about 25-26 years old and commonly ranging from early 30s to early 40s during his prime years as Batman. If a more precise age is needed for a specific comic, show, or storyline, that can be further detailed. Let me know if that is desired!