Work out betting odds converter instantly with clear inputs, formula shown and shareable results.
Everything is routed through decimal odds: implied probability is one over decimal, American odds are (decimal - 1) x 100 for favourites reversed below 2.00, and fractional odds are the best rational approximation of decimal minus one. Comparing prices across bookmakers means comparing implied probabilities, and only decimal odds convert to that in a single step.
Implied probability
implied % = 1 / decimal odds x 100
American odds
positive = (decimal - 1) x 100; negative = -100 / (decimal - 1)
implied % = 1 / decimal odds x 100. Everything is routed through decimal odds: implied probability is one over decimal, American odds are (decimal - 1) x 100 for favourites reversed below 2.00, and fractional odds are the best rational approximation of decimal minus one.
Comparing prices across bookmakers means comparing implied probabilities, and only decimal odds convert to that in a single step.
Enter odds value, format of the value entered. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.