Home · Learn · Odds Converter

Odds Converter

Type a price in any format and get the rest instantly: American, decimal, fractional, and the implied probability it represents.

Type any format

American

Decimal

Fractional

Implied probability (%)

American—

Decimal—

Fractional—

Implied probability—

Why convert odds

Books quote the same price in different formats: American (+150), decimal (2.50), and fractional (3/2) all describe the same bet. The most useful number is the one books hide: the implied probability, which is just 1 / decimalOdds. Converting to implied probability is the first step to judging whether a price is fair, because it tells you the break-even win rate a bet needs.

How to use it

Type into any field and the other three update live. Note that implied probability here includes the vig; to remove it and see the true fair price of a two-sided market, use the No-Vig Calculator. To turn a fair probability into an edge, use the EV Calculator.

Keep going

The Odds Gap holds every book's price, so you do not have to type them in by hand. Skip straight to the live tools:

Line Shop +EV Plays Hedge Finder Top Gaps

Parlay Calculator Odds Converter Arbitrage Calculator Kelly Calculator Hedging Calculator EV Calculator Teaser Calculator No-Vig Calculator Middle Calculator Hold Calculator Futures Hedge Calculator

The morning gap report.

The best gaps on the board, in your inbox at 10 AM ET. Free.