Poker Odds Calculator — Texas Hold'em Equity Math

This poker odds calculator is a probability and combinatorics tool: it answers the purely mathematical question of how often each hand wins, ties, or loses given the cards already known, the same kind of question a combinatorics textbook or a chess-engine-style equity tool would answer. Pick two hole cards for each of 2 to 6 players from the visual card picker, optionally add 0 to 5 community cards, and press Calculate. There is no betting, no stakes, and no wagering advice anywhere in the tool — only the mathematics of which 5-card hand each player can make from their 7 available cards.

Under the hood sits a real 7-card hand evaluator: for every player it checks all 21 possible 5-card combinations drawn from their 2 hole cards plus the board, scores each one (high card through straight flush), and keeps the best. Ties are broken correctly by kickers, and the ace-low wheel straight (A-2-3-4-5) is handled as a genuine 5-high straight rather than being missed. To compute equity, the tool enumerates every card combination that could still complete the board — for example, with the flop known there are usually only a few hundred to a few thousand possible turn-and-river combinations, so every one of them is checked and the result is exact. Pre-flop, the number of possible boards can run into the millions, which is too many to check instantly in a browser tab, so the calculator switches to Monte Carlo sampling: it deals 50,000 random legal boards and reports the resulting frequencies. The result panel always says plainly which method produced the numbers — exact enumeration or an estimated simulation — so you know exactly how precise a given percentage is.

Every card slot uses a real integrity check: the 52-card picker greys out and disables any card already assigned to another player or to the board, so it is impossible to accidentally deal the same card twice. The whole calculation, from dealing through evaluating every board, runs locally in your browser — nothing is uploaded anywhere. It is a study aid for understanding hand equity and the mathematics of Texas Hold'em, not a tool for placing or sizing bets, and it works for any scenario from a fully known pre-flop matchup to a river where only the winner is left to determine.