poker-odds-calculator.net is a set of free poker mathematics tools that run entirely in the browser: equity calculators for Texas Hold’em, Omaha and Short Deck, a range-versus-range simulator, and decision tools for pot odds, implied odds, outs, expected value, ICM, bankroll and rake.
How the numbers are produced
Hand evaluation uses a bitmask evaluator that ranks any five to seven cards in a few hundred nanoseconds. It was checked against an independent, naive implementation on 300,000 random seven-card hands with no disagreements. Equity is computed by full enumeration whenever the number of remaining boards is small enough (every postflop Hold’em spot, heads-up preflop, most three-way preflop spots); otherwise the calculator runs Monte Carlo simulation and reports the number of samples and the statistical margin of error. ICM uses the Malmuth-Harville model, computed exactly with memoisation for up to 20 players, and ranges are expanded to individual combinations with card removal for the board, dead cards and known hands.
What the site does not do
It does not store hands, does not require an account, sets no cookies and loads no third-party scripts. Sharing links encode the scenario in the URL itself.
The site is an educational tool about poker mathematics. It is not a gambling operator and does not promote any poker room.
Contact
Corrections, feature requests and questions about the widget: contact@poker-odds-calculator.net.