The rule of 4 and 2 is a shortcut for helping you to work out the percentage odds of a draw completing
- Multiply your outs by 2 when you are on the flop waiting for the turn.
- Multiply your outs by 2 when you are on the turn waiting for the river.
- Multiply your outs by 4 when you are on the flop waiting for the river (opponent is all-in).
When you have multiplied your outs by either 4 or 2, you will get a percentage that you can compare with your pot odds to work out whether or not it’s worth calling with a drawing hand.