Want to find out what the odds are for winning a particular poker hand against another or the odds of a certain hand winning at all? Try one of these excellent free online poker odds calculators.
Whether you play Hold'em or Omaha, Cardplayer.com has a calculator to help you calculate and understand how hands stack up against each other. Select a number of players then give them each cards. Click on Calculate odds and the percentages will appear. Want to add a flop and turn? Click on more cards and recalculate each hands' odds of winning on each street.
A Texas-Holdem-only calculator that lets you see the odds of up to five hold'em hands against each other, before the flop, after the flop, and after the turn and river, too.
While this calculator isn't graphically based as the ones above are, it has a much wider range of poker games it can calculate odds for, including Hold'em, Omaha, many seven-card stud games, and deuce-to-seven lowball. You need to type in all the hands and board cards, as well as dead cards, but if you have a hand history, it's just a matter of cutting and pasting.
Poker Stove is a great free download for Windows users that lets you calculate your odds against a range of hands in Texas Hold'em. It's a great tool for more advanced players who are able to put an opponent on a few possible hands -- and then see what their hole cards are worth against that range of hands. Since often you never find out what your opponent is holding, this is a great way to see if your action based on your read of the other player is profitable or smart.