Prediction Markets Converter

Prediction markets like Polymarket and Kalshi quote prices in cents, where the price is the implied probability: a contract trading at 65¢ means the market gives the event a 65% chance. This converter translates any contract price into American, decimal, and fractional betting odds, and works backwards from any odds format to the equivalent market price.

The conversion makes cross-platform comparison trivial. If a contract trades at 65¢ (-186 equivalent) while a sportsbook offers the same outcome at -150, one of those venues is mispriced, and because prediction markets carry minimal built-in margin, they are often the sharper reference point.