Board Thread:Theories and Speculation/@comment-27082825-20150210170257/@comment-3279282-20150210171306

Well, Madara was at least 48, because that's the time he spend away from the village. Let's say Izuna died 2 years before that, that makes Madara 50. Izuna died at age 24 and Madara is supposed to be older. So he was at least 74 when he died, more likely around 80.

No idea about Hashirama, though. I'd guess he was around the same age, but he died earlier. Maybe in his 40s.