Quick answer: enter the odds and this tool converts the formats and shows raw implied probability. It does not predict a win.
How to read the formats
Decimal odds show the total return, stake included. Fractional odds show profit relative to the stake. With American odds, a plus number shows the profit on 100 units; a minus number shows the stake needed to make 100 units of profit. The notation changes, but each format describes the same underlying price.
Odds converter
Enter odds once to see the decimal, fractional, and American versions, plus raw implied probability.
Raw implied probability is calculated from the odds before adjusting for a bookmaker’s margin. Treat it as a conversion, not a prediction.
How is implied probability calculated?
For decimal odds, divide 1 by the decimal price to get raw implied probability. The result may include the bookmaker’s margin, so it is not automatically a fair chance—and certainly not a guarantee.