How old is Batman right?

Answer 1

As of right about now, Batman comics have been around for 70 years.
In the Christopher Nolan movies, batman is supposed to be in his mid 20s.

If you want to know how old batman is in comic book continuity...

Because of various continuity changing events (namely, the four crises), heroes have become younger as time goes on, to keep them contemporary.

Bruce Wayne, as of 2009 is around his early to mid 40s. He began as Batman at 25, took Robin under his wing at 28, took on the second Robin in his early 30s, has his back broken at about 35, protected no-man's-land at about 37. By Infinite Crisis, Batman is approximately 39 years old. One Year Later, he's 40ish. Countdown and Final Crisis occur soon afterwards, so it is likely that Batman is either 40-42 at the time of his 'death.'

Dick Grayson is the current Batman. He is likely close to being 30 years old now.