Odds converter
One price, three ways of writing it. Put in American, decimal or fractional odds and the converter gives you the other two, with the chance the price implies.
- Winnings
- $90.91
- Total payout
- $190.91
- Implied probability
- 52.4%
- American odds
- -110
- Decimal odds
- 1.91
- Fractional odds
- 10/11
Same bet, different clothes
A US book writes +150, a European one 2.50, a British one 3/2. They are the same price. A $100 bet wins $150, $250 comes back to you including your own stake, and the price says the bet wins 40 percent of the time, which I'd write on a card and keep beside the screen until the three formats feel like one. I use a converter for one job above all: shopping the line across books that don't write odds the same way. Same game, same side, and three ways of hiding which price is better.
Where it trips people up
Decimal odds include your stake. American odds don't. A 2.50 that pays $250 on $100 sounds bigger than a +150 that pays $150, until you notice the first figure counts your own $100 coming back. Compare prices in one format, or by the implied percentage, and the confusion goes away. I'd pick the percentage. It is the only figure that means the same thing at every book in the world. The how to read odds guide covers all three formats from the start.