Poker Probability Calculator

This poker probability calculator (The Meercat9 Texas Hold'em Poker Probability Calculator) is designed to calculate the odds of a standard game of Texas Hold'em.

Unlike almost every other web-based calculator for this game, it doesn't require you to know everybody's cards - since that would defeat the purpose. This is a calculator that you can use while playing (assuming that you're a good multitasker and decent typist).

Just enter the number of people playing (including yourself), the two pocket cards that you have, and any cards (if any) on the table that you know of.

How to enter cards

When entering cards, enter each card's two-digit identifier separated by a space. The table below illustrates the identifiers.

Entering other players' cards

While this usually won't be of much help while you're playing, you can also enter the pocket cards that other players have. This helps fill in some blanks and gives a better insight to your chances of winning. You do not need to enter the cards that every player has - any remaining gaps will be filled in by the program.

To enter others' cards, just enter each card separated by a space (use the guide above for how to enter cards), and continue this for more players. E.g. "ac kd 4c 8d" means that one player has "ac kd" and the other has "4c 8d". Hence, the number of cards must be an even number.

How it works

The Meercat9 Texas Hold'em Poker Probability Calculator will then spend 3 seconds generating as many random complete hands from the information it is given to calculate an estimate of the overall probability.

While in many cases the number of outcomes could be as high a billion, a few hundred tests at random should be enough to give a very reasonable estimate of how things will pan out. Since Meercat9.com is not running on a super-computer, this estimate of ±4% is the best we can do in a few seconds of processing time.

Poker's more than maths

Poker is about more than probability, odds and mathematics. While the calculations and mathematics behind the game can be both interesting and insightful, there are variables coming from human error that make true logic a back-seat player.

Using this calculator, you will be less likely to over-estimate your hand, and more likely to play hands that are stronger than they might seem (i.e. perhaps that pair you have given what's on the table is actually a decent hand) - but it's not about how often you win, it's about how much you win.

For best results, I would recommend using this calculator in "Fixed Limit" or "Pot Limit" games, where betting is restricted. This way, the player who wins the most often will tend to be the overall winner, rather than the player who has the best luck on the enormous pots.

It doesn't matter if you strategically and intelligently win $5 pots repeatedly for a few hours if you lose the $1000 all-in at the end of the night.