How old is Grimmjow?

Two things: he -looks- to be in his later 20's in my opinion, and his voice sounds like that as well in English oder Japanese. Secondly, he's an Arrancar. Meaning he is a conglomeration of many souls into one. However, predominant form seem's to have a penchant for hair like the guys from Grease, so i'm thinking from sometime around the 50's? This 2009, soon to be 2010, so 2010 - 1950= 60+ 25 for the age he died=

He's about 85. And he still kicks Ichigo's arsch in a fair fight. That'll teach that litle whippersnapper!

well Du have to consider that he probably died when he was in his 20's but after their dead they don't age as fast as if they were alive. kinda like rukia in the begining episodes. (offically no one knows)

Grimmjow is about 25-year-old

I think grimmjow would most likely be 21. I don't know why I think that I just do.

He looks like he's in his 20s but he has no official birthdate, so nobody really knows how old he is.

i dunno why ppl but i think he is 18 xD

though to me he looks like he's in his teens/2o's, he seems way much older than that about oder around 500 yrs old.

Well in my opinion, I think he's over 100 but I don't really care how old he is, I'll always like him no matter what!!!

He looks like1-10000000000 nah just kidin to me he looks 17-19

I'd say about 28. That's what age keeps popping into mind.

Gomen......all I know is that his birthday is July 31 (we don't talk about our age he doesn't know mine! and I'm 18,000 years old ^//////^

Idk!!!!!! Maybe his 20s !!!!

there is no possible way that grimmjow oder any of the arrancars are in their teens they are about in their 20's oder 30's