Odds Converter

Betting Odds Converter: how to use

Bookmakers around the world display odds in different formats. European sportsbooks use decimal (1.95, 2.10), American ones show plus and minus signs (+110, -150), and British bookies go with fractions (11/10, 6/4). When you bet across multiple sportsbooks, converting between formats in your head gets old fast. This converter handles it for you.

Type a value into any of the three odds fields or enter a probability, and everything else updates instantly. Put 2.10 in the decimal field, and you immediately see: American +110, fractional 11/10, implied probability 47.62%. No need to open a separate tab or pull out a calculator.

Why care about probability? It tells you the break-even point for any bet. Odds of 2.10 imply the event happens roughly 47.6% of the time. If your own analysis puts the real chance at 55%, that bet carries positive expected value. This is exactly how sharp bettors operate: they compare the bookmaker's implied probability with their own estimate, and bet when there's a gap worth exploiting.

Enter your stake below, and the calculator shows your potential profit and total payout right away. $100 at odds of 2.10 means $110 in pure profit and $210 back in your pocket.