The number of cards that theoretically remains in the deck to complete your hand, or give you the “nuts“. Outs coincides with the odds of your hand to give you your percent chance to hopefully draw the winning card.
If you have a straight draw or flush draw, the first things you have to do is to determine how many outs. Before the real odds calculation, determine the number of outs is very important because it will directly affect the result.
Let’s take a look at the following example. Let’s say you are holding Jc10c, and the flop brings a Ac-6c-3d, now one more club will complete your flush. So, any club is an ‘out’ here. There are 13 clubs and four of them are present, so there are a total of nine ‘outs’. It means that nine cards will help you to finish the flush.