quick easy question about SD and BR

[gp?]

i know you can find the correct BR given your standard deviation in limit, similiar to how malmuth described in his poker essays. but is this possible to do in no limit? if my SD over 20k hands is 45PTbb/100 and i'm starting over with a new bankroll (given that i want to play at the same stakes), how many buyins should i have? what about if it was 15PTbb/100?

thanks


i just spend 20 minutes searching and couldnt find the answer i'm looking for, btw.