Odds are defined as the ratio of the number of ways not to draw the hand, to the number of ways to draw it. In statistics, this is called odds against. The odds against hitting certain hands in Texas Hold'em are:
Chance of getting
a Royal Flush: 649,740-1.
Chance of getting
a Straight Flush: 72,192-1.
Chance of getting
4 of a Kind: 4,164-1.
Chance of getting
Pocket Aces: 221-1.
Chance of getting
Ace-King Suited: 331-1.
Chance of getting
a Flush: 208-1.
Chance of getting
a Straight: 253-1.
Chance of getting
Three of a Kind: 46-1.
There are 1,326 combinations of starting hands in Texas Hold'em, 78 pocket pairs, 312 suited hands and 936 unpaired off suit hands.