ALL IN PREFLOP               APPROXIMATE %

AK v 76 suited                     AK wins 60%

AK v QJ                                 AK wins 64%

AK v 22                                 22 wins 51%

AK v KQ                                AK wins 73%

AK v AA                                AA wins 87%

AK v KK                                KK wins 66%

AQ v KQ                                AQ wins 70%

AQ v QJ                                  AQ wins 70%

AQ v KJ                                  AQ wins 60%

AT v KQ                                 AT wins 58%

AA v KK                                 AA wins 80%

AA v 22                                  AA wins 80%

AA v 76 suited                      AA wins 77%

A2 v JT                                   A2 wins 55%

KK v K2                                  KK wins 94 %

The rule of 4 and 2

The rule of 4 and 2 is a quick way to work out the appoximate % of completing a draw in Hold’em. To get your percentage odds:
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 % that you can compare with your pot odds to work out whether or not it’s worth calling with a drawing hand. On the flop only multiply by 4 if your forced to go all in.