Well... if i were to put, lets say, one gram of weed, then i put the amount of hash oil i would get from one gram of weed. Dont know how many points it mean, as it depends of the quality of your hash oil.
If you have not idea of how much it mean, try some 4-5x the amount you usually smoke, and see if you like the results.
I use more than 10x the amount i smoke, but its because i smoke the smallest amount enough for make me high, and thats a very small amount.