Outs
出路（Outs）
Outs are the specific cards remaining in the deck that will improve your hand to what you believe will be the winning hand. Counting outs is the first step in calculating your equity. The rule of 2 and 4 gives a quick estimate: multiply your outs by 2 for one street, or by 4 for two streets, to get your approximate equity percentage.
Example
With a flush draw on the flop, you have 9 outs (remaining cards of that suit) to complete your flush.
Related Terms
More Math & Odds Terms
Equity
Your share of the pot based on the probability of winning the hand.
Pot Odds
The ratio of the current pot size to the cost of a contemplated call.
Expected Value (EV)
The average amount you expect to win or lose from a decision over the long run.
Implied Odds
Pot odds adjusted for the additional money you expect to win on future streets.
Fold Equity
The probability that your opponent will fold to your bet or raise.
SPR (Stack-to-Pot Ratio)
The ratio of the effective stack size to the current pot size.