Every format. One probability.
Decimal, fractional, American — the same odds wear different clothes depending on where you bet. Convert between all of them, and read the one number that actually matters: the probability the price implies.
The idea
Odds are a probability in disguise.
Read the price, not the payout.
Divide 1 by the decimal odds and you get the probability the bookmaker assigns to that result. 2.00 is 50%, 4.00 is 25%. The format is just packaging — the probability is the substance.
One catch: that implied probability already includes the bookmaker margin, so it is always a little higher than the true chance. The odds never quite play in your favour.
Convert any odds
Type the odds in any format and see the rest instantly.
Decimal
2.50
Fractional
3/2
American
+150
Implied probability
40.0%
What they do not tell you
The implied probability is NOT the real probability of the event: it carries the bookmaker margin inside it. The implied probabilities of a match add up to more than 100% — that excess is what the bookmaker keeps.