implied/reverse implied odds

i understand how to apply implied and reverse implied odds to hands on the turn for the river, but i don't see how to use it on the flop for the turn and river. can someone show me an example? thanks.

What do you mean when you say that you know how to "apply" them on the turn for the river, but not on the flop for the turn?

"On the second to last betting round, Alice's hand is certainly behind and she faces a $1 call to win a $10 pot against a single opponent. There are four cards remaining in the deck that make her hand a certain winner. Her odds of drawing to one of those cards is 10.5:1 (8.7 percent). Since the pot lays 10:1, Alice will lose money by calling if there is no future betting. Since Alice expects to always make an additional $1 when she makes her draw, and always fold when she misses her draw (lose no additional bets), her implied pot odds are 11:1 ($10 plus the additional $1 bet, to her $1 call). This call now has a positive expectation." - wikipedia

and similar for reverse. what changes if i want to calculate from the flop?

Implied odds are about guessing how much more money you can win from your opponent if you make your hand. The only difference between the flop and the turn is that there are more cards and more betting rounds to come. It's still a guess. It's of course also a lot more difficult in no-limit than in limit.

so for example in limit holdem, on the flop, you calculate your implied odds. do you add two big bets (turn and river) to your calculations, or just one? because if you do two, it seems like you would be getting correct odds to call in almost any situation!

There's no formulaic answer; it depends on your opponent. If your opponent is loose and aggressive, you can probably win 2-3 big bets from him if you hit your hand on the turn. If he's very tight, you might not win any at all.

what do you do? do you ever calculate from the flop?