andovereragon

Ok, so for the summer I'm at a boarding school which monitors our internet usage. What I mean by this, or what they have told me, is that you can only use 1 gig of internet, whether this be games, youtube videos, etc. My question is, if I want to play Runescape how long would I be able to play until this gig of usage or whatever they call it, is used up... Would anyone know how to measure that or something? Thanks