i put like .3 -.4 tops into a skinny zig zag paper, and thats about 10 minutes or 15 max.

of course when i do wana get fucked up, i wil roll 1 gram into an l paper which burns about 25-30 when i burn it to my head. 1 gram is also enough for a skinny blunt with a little baccy, which burns almost 40 minutes for me.