[Kenser]

I just know to get the same amount of risk and profit potential on 1 hand compared to multiple hands(this takes into account splits/double downs) you place 73% of your 1 hand wager on 2 hands and 57% on 3 hands. 57% of $5 is $2.85 for your example. Of course you could not bet this odd amount. These figures give you the same risk on 1,2 or 3 hands. The number of rounds has nothing to do with it. If you play more rounds with a higher risk, your variance will increase.