The Rule of 4 and 2

Brief Intro

The Rule of 4 and 2 is an easy way to approximate your chances of winning a hand.

Brief Use

If you are at the flop, multiple your number of outs by 4 to give you the approximate percentage of winning the hand

If you are at the turn, multiple your number of outs by 2 to give you the approximate percentage of winning the hand

Examples of Use from the flop

If you have the nut flush draw, then you have 9 outs, and your approximate chance of winning the hand is 9x4 = 36%

If you have a flush draw and an inside straight draw then you have a likely 12 outs, and therefore your approximate chance of winning the hand is 12x4 = 48%

Examples of Use from the turn

If you have the nut flush draw, and a likely 2 overcards from the turn, making 15 outs, then your approximate chance of winning the hand is 15x2 = 30%

If you have an inside straight draw from the turn, then your approximate chance of winning the hand is 4x2 = 8%

Summary and Advice

1. The rule of 4 and 2 is useful in approximating odds from the flop and from the turn.

2. As you can see, about 13 outs from the flop is around the boundary that will make you the favorite from the flop (13x4=52%).

3. Be wary of what you define as outs. Often you need to judge your opponent and the situation and come to a reasonable decision of what are your likely outs. With something like the nut flush draw, or the top end of an open-ended straight draw, these outs are more clear.

4. The odds are approximate. In some cases you may be a couple of percent out, so bare that in mind.

5. Remember to also take into account pot sizes alongside the actual percentages.

Article Written by member Lemon11