That's just under 1/8th...
It all depends what you're comparing it to (generally how much you smoke)
It would last me ~2 months assuming i didn't smoke lots of people up or shit, but my friend who smokes less often than me will go through an eighth or more in a week if he has weed.
I have an unusually low tolerance/high sensitivity, while the opposite is true of him.
In the eyes of most people here, 1/8th is not much weed. I think most people here would go through it in less than 2 weeks, and a fair number would have it smoked in a few days.