I'm 16 and i sing in a rock band. Although i'm an alright singer the highest i can possibly get in my chest voice is a G4 and i cant even keep that up for a full song. Since most of the songs we want to play go up to around an A this is not good.
I've had a look around the internet for advice on increasing my range or whether i can do it atall but all i can find are articles on 'eliminating the register break', but to sing songs by bands such as audioslave in my head voice would just NOT sound good. I want to increase my chest range by around 4 semitones.
Anyone got any tips?

It is impossible to increase your chest range, and trying to increase it by straining will probably cause vocal damage. You have what you were born to have. While you may think some professional singers are singing in chest voice, most are using mix voice which is a blend of chest and head resonance (though it may sound like chest). This is what you will learn through vocal training. With enough training, ideally your voice will be one smooth instrument blended from top to bottom. Only your lowest notes will be full chest, and your highest will be pure head voice, everything else will be a mix(chesty or heady depending on the note). This is the only way to increase your range(without destroying your vocal cords). The easiest way to train is to use Seth Riggs' book "Singing for the Stars"(about thirty bucks on amazon) or his Singer's Advantage program. It transformed my voice! Good luck!

G4 is G before middle C ?

<Added>

*after, sorry

hmm i dont know much about rock bands but have you tried a falsetto voice?

i use to sing in about your range as well...but i chose one song that had a note that i tried and tried to reach...i always went out of tune because i couldnt, i dont suggest you strain your voice as others have said,but gradually ease into it.it took me about a week before i could hit it...and now it is so EASY to hit that note(i honestly dont remember which note) after i hit that note i worked on a higher on and higher and higher and i as i went it became easier and easier.
but now my trouble is...ive started singing songs an octave high...and my mom who sings alto keeps complaining that she cant sing that high.(which im workin on!) but anyways Good Luck singing.

Amie Jo

not really a singing suggestion, but maybe if your instrumentalists don't mind you could transpose the song into a lower key

Iam also trying to improve my vocal range, i can sing roughly I think it is also a G4 i'm not sure. I like to sing alot of Bon Jovi (mainly Backing Vocals lol) which are rather high and i think i need to be hitting like a C5 or something to get "Livin' On A Prayer" But i don't like to strain my voice.

It took me about a week and a half to progress from my original F4 through F#4 to my G4, Iam very close to Ab5 any tips for getting there and having it comfortable enough to perform with?

Thanks

Dan