I know that when it comes to delta, you would calculate your position delta (of a stock position) as follows:
option delta * position size * 100
For example if I am short 15 calls with a delta of 0.2, my position delta would be:
-0.2 * 15 * 100 = -300
That figure of -300 shows how my position is impacted by directional movements in the underlying. That is why I don't just look at the 0.2 delta, I need to change it to my position delta.
My question is, do you do the same thing with vega, theta and gamma? I presume you do,...but I am new enough to options such that I need to ask.