How far does 300 GB of data stretch?

[OscarTheTitan]

I'm getting my own house soon and I'm looking into an optus phone+internet bundle. It includes 300 GB of data, free calls Australia wide and something called Optus TV with Fetch (Recording stuff I guess)
So what I'm wondering is how much data will I use if I'm living with my fiance and we both like to surf the net a lot watching videos, torrenting things and doing a lot of general browsing. Will 300 GB be enough?

 

[Novuake]

Watching Videos and torrenting... Those will eat 300GB like its NOTHING.

 

[manofchalk]

Torrenting things can be massive or tiny depending on how much you actually download.
Look at the Internet usage on your current plan and see how much download you are actually racking up, that's how you can tell how much you need.

Or get an Unlimited* plan (TPG offer one I believe) and never have too worry about it.