Tool or formula for risk of ruin?

[dbirider16]

I have seen this posted before a few times but I can't find it. I'm looking for a tool where you can type in how many bb's you have at a limit, how much of a winner you are (like 1bb/100) and it will give you your chance of going broke. specificly i'm trying to figure out the risk of ruin for a 1bb/100 player with 100bb's.

Thanks