Odds Converter
Convert any betting odds between American (moneyline), Decimal, Fractional and implied win probability — instantly.
Fractional accepts formats like 3/2 or 5/1. Implied % is the break-even win probability.
Doing this by hand, one bet at a time?Our API runs this math automatically across
25+ sportsbooks in real time — surfacing +EV bets and arbs the moment they appear. See the free
live board, or plug into the API.
FAQ
How do I convert American odds to decimal?
For positive American odds: decimal = 1 + (odds ÷ 100). For negative: decimal = 1 + (100 ÷ |odds|). So +150 = 2.50 and −120 = 1.833.
What is implied probability?
Implied probability is the break-even win rate the odds represent: 1 ÷ decimal odds. At 2.50 (‑) the implied probability is 40%.
Is this odds converter free?
Yes, completely free with no sign-up.
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