Get Instant Help at the Tables with our Poker Odds Calculator! PokerListings. com's Odds Calculator is the fastest, most accurate and easy-to-use poker odds. This is not your typical poker odds calculator. See odds against known cards, random opponents or place players on hand ranges with detailed stats. Using our odds calculator is simple: Enter your odds in American, Decimal, Fractional or Implied, followed by your budgeted bet amount, and our calculator will.