How old is Batman in the comics?

In Batman tahun One Bruce Wayne is berkata to be 25. He met Robin (Dick Grayson, 12 years old) in his saat atau third tahun as Batman. He must have been about 27-28 back then.

Robin becomes Nightwing when he is 18 years old. Batman must have been 33-34 years old then.

He trains Jason todd (Robin II) for six months, and he dies approximatly in the same year. So Batman must have been 34-35 then. (Note that he has been at this point already 10 years on the job, but in No Man's Land they say he's been 10 years Batman at that point, which is impossible)

He meets Tim drake and trains him aproximatly the seterusnya year, so he must have been 36 at that point.

Now he joins the JLA, the whole Knightfall Saga and all, en let's just pretend all that only lasted for a year, he must have been 37 then.

Then comes No Man's Land, which last exactly One Year. He's 38.

Then it's Bruce Wayne Murder, Hush, End of JLA until Infinite Crisis. Let's say that lasted another tahun months. 39 years old

Then comes 52, and ofcourse One tahun Later. 40 Years old.

And I'm willing to say that until Final Crisis, all that has been six months. So he's 40,5.

P.S. I think that Tim Drake's about 16,5 atau 17,5.


What do anda think? Am I right? Am I wrong?