Originally Posted by dmorris68
Yes its 2% per street, but actually his question was "wouldn't you then multiply your outs by 2 on the flop instead of 4?" And the answer would be no.
If you need only 1 card to make your flush and you are on the flop (i.e. 2 cards to come), then you multiply by 4. It has nothing to do with someone going all-in or not or whether he's planning to bet the turn or not
It most certainly does matter that one of you is not all in and that you may face a further round of betting on the turn!
It would be very foolhardy to call a pot sized bet (33%) believing that you have 36% equity, and then have to call another big bet
on the turn. You don't have 36% flop to turn and then
18% after the turn. You only have 36% equity for BOTH streets, otherwise you have roughly 18% for each street treated seperately
to the question "wouldn't you then multiply your outs by 2 on the flop
instead of 4", the answer is still, definitely yes
This concept is covered very sensibly in the OP's link and in some detail in these recent forum posts
I've included the last one as it has detailed info from the OP on the varying probability of 2% 'flop to turn' and the slightly different 2% 'turn to river'