To understand the concept of the Poker Odds Calculator, it helps to first appreciate the fact that poker is a game of both skill and chance. This is to say that the chances of your winning in any game of poker - which essentially means emerging with the 'best hand' at the end of the game - depend both on the strategy you apply for the game as well as your luck for the day. Taken further, the fact that poker is a game of both skill and luck means that even if you have the best of luck on a given day but your poker strategy is flawed, then you will have a very difficult time indeed in winning any poker game . And similarly, even if you have the best of poker strategy, you could still find yourself losing a game of poker to a less skilled player whose luck happens to be better that particular day.
But while poker is both a game of skill and luck, it is noteworthy that luck plays a minimal role where an extremely knowledgeable player is pitted against a less knowledgeable player. And part of 'knowledge in poker' is knowing what the chances of winning a particular game of poker are if you take given combinations of cards during the game. Put another way, your chances of success in any poker game will depend on the odds of the cards you happen to hold turning out to be 'best hand' on the table at the end of game.
So what the poker odds calculator does is to advise you on what your chances of winning a game of poker has given a particular card combination are. Armed with this information, you can make better betting decisions - to maximize on your win if the odds favor you, and to minimize on your losses if the odds are against you.
There are many versions of the poker odds calculator made by different people and which work through different mechanisms. There is, for instance, poker odds calculator which works out the odds of your winning a game of poker given a particular combination of cards based on observations from numerous (real-life) poker games, that is, where the poker odds calculator is backed by a database of statistics from numerous poker games; from which the statistically likely of winning a particular game of poker using a particular combination of cards can be worked.
There is also another version of the poker odds calculator that is based on pure statistical calculations (rather than data from previous poker games), with the programmers who advocate this approach to making the poker odds calculator arguing that the alternative to it - using data collated from previous poker games - opens the calculator to being influenced by habitual mistakes made by players from what the data was collated, mistakes that the poker player using the calculator might not be open to. Critics of this type of poker odds calculator, on the other hand, argument that the approach behind it is simply 'too abstract' for real-world poker.
All in all, there is agreement that whatever the mechanism behind it, the poker odds calculator can be a handy tool, which when properly used, can greatly enhance the chances of a particular poker player making a success of their game.