Convert betting odds between decimal, fractional and American formats, with implied probability.
Result
How to use this tool
Enter the odds value in its current format.
Select decimal, fractional, American or probability %.
Read the same odds in every format plus implied probability.
Compare decimal odds across bookmakers: higher decimal means a higher payout.
Formula & worked example
Decimal odds of 2.50 mean fractional odds of 3/2, American odds of +150, and an implied probability of 40%.
Limitations — read this before you rely on it
Conversion only: it does not remove bookmaker margin, predict outcomes, or account for each-way or each-way terms.
Frequently asked questions
Total return per unit staked, including the stake: 2.50 returns 2.50 for a 1 stake (1.50 profit).
Profit per unit staked: 5/2 means 5 profit for every 2 staked, equal to decimal 3.50.
+150 means 150 profit on a 100 stake; −150 means you must stake 150 to win 100 profit.
1 ÷ decimal odds: the win chance the odds imply, before any bookmaker margin.
Bookmakers build in a margin (overround), so the implied chances of all outcomes exceed 100%.