Reading the odds, which are critical in understanding, plays an important role in sports betting. A bet’s potentiality of winning (or losing) is what odds signify, also serving to establish prospective rewards.
Reading betting odds is essential if you are a bettor, and beyond mere figures on a screen, these odds represent more. They encapsulate the potentiality of a specific event’s result and determine your prospective winnings from a successful bet.
The format of odds can vary significantly, but they all share a similar essence. They are there to tell the bettor about possible payouts and to assist with understanding a bet’s risk.
This guide places, at the forefront, the predominantly used betting odds within the US: American (or moneyline) odds. There is also some mention of decimal and fractional odds, which enjoy popularity in certain other territories across the world..
American odds are prominent in the broader United States, and are the go-to odds format for most American bettors. The positive number (+) represents the underdog, meaning it takes less to win more money, but also comes with more risk. The opposite is true with negative numbers (-), indicating the favorite, and requiring more money to win less.
Positive odds, like +120, means betting potential gains from a $100 wager. Wins tied to bets at such odds yield $120 extra, in addition to the initial wager.
Negative odds, (-120, for instance), are not interpreted in the same fashion. Understanding how much will be wagered in order to obtain a $100 profit is what they reveal. In the case of -120 odds, if one desires a profit of $100, the dollars risked must total $120. This American odd system allows a rudimentary understanding of both potential returns and the size of bets.
| Odds | Explanation |
|---|---|
| +300 (Underdog) | If you bet $100, you win $300 (total payout: $400) |
| -300 (Favorite) | If you bet $100, you win $33.33 (total payout: $133.33) |
Calculating potential winnings using U.S. odds comes down to a simple equation, with the main factor being the positive and the negative. Let’s take a closer look at an example of both using a $100 wager. To make this process even easier, you can use our betting odds calculator, which instantly computes your potential winnings based on the odds and wager amount you input.
For positive odds, let’s consider a bet that is listed at +300. The formula is as follows:
For negative odds, let’s consider a bet that is listed at -300. The formula is as follows:
When visiting sportsbooks located outside the United States, decimal and fractional odds will be the primary type of odds you see. Once you are used to them, they are actually quite easy to understand. Let’s take a closer look at an example using fractional odds again using a $100 wager.
For positive odds, let’s consider a bet that is listed at 4/1. The formula is as follows:
For negative odds, let’s consider a bet that is listed at 1/4. The formula is as follows:
A key factor in determining if a bet is a good one or not and present values, is understanding the implied probability in betting odds. Another way to imply probability in betting odds is by turning the odds into a percentage representing the likelihood of an outcome.
Implied Probability = 100 / (Odds + 100) x 100
Implied Probability = Absolute Odds / (Absolute Odds + 100) x 100
The more you understand implied probability in betting odds as a bettor, the more you’ll be able to determine if a bet has value or not. If the implied probability you determine is higher than the sportsbook posts the odds, that means you should take the bet as you’ll have a higher potential for profitability.
Understanding how to convert odds between different formats—such as American, Decimal, and Fractional—is essential for bettors who want to analyze and compare wagers across various platforms. For example, an American odd of +200 is equivalent to a Decimal odd of 3.00 or a Fractional odd of 2/1.
While manual calculations can be done, our betting odds converter calculator simplifies the process, allowing you to instantly switch between formats with accuracy and ease.
When it comes to reading odds, the best tip I’ve ever received is to shop around at various sportsbooks to find the best number. No matter where you are located, if sports betting is legal in your jurisdiction, more than one sportsbook will be available to sign up for. Having more than one option can mean the difference between being a profitable and losing bettor in the long run.
Another useful tip for using odds in your betting strategy is to pay attention to where the line moves throughout the week. From the minute a sportsbook posts odds on a game, the number will move up and down based on factors such as “smart money” received, injuries, weather, and more. By monitoring which direction the line moves, you can choose the best time each week to get in on the action.
Becoming a master in reading odds is a fundamental skill to have if you want to be a successful bettor. It doesn’t matter if you are dealing with American odds, decimal odds, or fractional odds, you now have all the tools to understand their meaning to help you make the most informed decision possible.
Before you jump into the action, use examples like the ones provided above to maximize your chances of being a winning long term bettor by fully understanding how to read the odds.
Implied odds represent the probability that is derived from the betting line posted, while true odds represent the actual likelihood based on your own independent analysis of the game or event.
Sportsbooks set the odds on a game or event by using a multi-tiered approach including statistical models, their own expert analysis, and other market factors such as injury, weather, and betting activity.
You can use the odds, whether they are negative or positive (American), to help calculate the potential profit and total payout based on the money you risk. Using the appropriate formula, whether you are using the American, fractional or decimal odds, you can calculate your total return.
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