Quote Originally Posted by DogOnMySide
I already did this, but a backwards way round. And my calculations requires more bankroll than yours. Basically i used a multiplier of 0.75 for each table...

Table 1 needs 50*20 = 1000
2 Tables needs 1000 from table 1, plus 50*20*0.75 = 750
3 tables needs 1750 from tables 1 and 2, plus 50*20*0.75*0.75 = 562
4 tables is 50*20*0.75*0.75*0.75 = 421

So my 4 tabling 50 calulation asks for a BR of 2733 or 54 buyins, whereas you wanted 1520, or 30 buyins.
Renton's numbers are much more accurate IMO, there is just no way that you need almost double the bankroll when you are playing 4-tables. If you do then you shouldn't 4-table.