If that's $100, you'll profit $125, for a total of $225 in winnings. By this measure, for an event with 5/4 fractional odds, you'll win 125 percent of your initial investment. The number on the left shows you how much you stand to win, while the number on the right tells you how much you'll need to wager. It sounds a little confusing, but it just takes a little practice.

When odds are written in this format, they tell you how much cash you can win on your bet in comparison to your stake. These are all presented with slashes, such as 3/2, 5/2, 1/1, and all that. So, if you're placing a bet on an event with decimal odds of 2.50, you're looking at a payout of $250 for every $100 you invest-or a profit of $150 total.įractional odds are easy to identify, though not as simple to calculate. These odds represent the amount for every $1 wagered. Decimal Oddsĭecimal odds are also incredibly easy to interpret once you get the hang of them. As the name suggests, they're presented in a decimal format: 1.00, 1.50, 2.75, etc. In this instance, each successful $100 wager will result in a $250 profit. For positive odds, you're simply seeing the amount of money you stand to win for every $100 you bet. On the flip side, let's say you're dealing with a +250 moneyline. So, for this event, you'll need to wager $250 in order to make a profit of $100. In this case, the difference between -250 and 0 is 250. They're written in the form of '-100' and '0.' For negative odds, you're simply calculating the difference between the provided number and '100.' Once you have that, you'll know how much money you must risk in order to win $100.

Even if they don't, their servers can often detect your location, and if you're in a territory that predominantly uses American odds, this will be how all the event lines you see are presented.

Pretty much every online sportsbook prefers to roll with the American odds format. These are the most common forms of betting lines.

Sports betting parlay odds calculator