It all depends on the quality.

Shagg weed, or really shitty weed, it will take more than a gram to get fucked up. Roll up a huge blunt, and smoke it as fast as you can.

Mids, meh, a gram should do it fine. Roll it it in a fatty and puff it all down.

But if it is high quality stuff, I could get ripped from a gram 2 or 3 times. If you have good stuff, i suggest a bong or the bucket bong.