While these numbers aren’t 100% precise and will depend on other backdoor options, they’re a very good approximation. Chances of making your straight by the river: 4 * 4 = 16%.Chances of making your straight on the turn: 4 * 2 = 8%.There is no need to make things too complex here, and I will stick to the straightforward “Rule of Two and Four.” You take the number of outs you have and multiply it by two to get your odds for the turn or by four to get the odds for the river.įor the inside straight draw, you’ll always have four outs, so: So, what are the actual inside straight draw odds, and how likely are you to make your hand on the turn or the river? Every time you think about strategies for a certain poker scenario, you first need to know the basic math behind it and understand poker odds.