Betting Odds Explained – A Beginner's Guide to Gambling Using Betting Odds to Calculate Probability. Whenever you see two numbers separated by a trailing slash, i.e. Using Betting Odds to Calculate Winnings. Betting odds allow you to calculate how much money you will win if you make. Betting a Favorite: The odds for favorites will have a minus (-) sign, and represent the money you need to risk to win $100. So if you're betting on the Packers at -140 against the Vikings, that means Green Bay is a slight favorite. You need to risk $140 to win $100 on the Packers. If they win, you profit $100 and get your original $140 back. If the odds are minus (–), then that amount of money must be wagered to win $100. –150 means you must bet $150 to win $100.) If the odds are plus (+), that amount of money would be earned on.
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Learning how sports betting odds work can be intimidating at first, but our guide will teach you how to read odds in no time! This primer is designed for beginners who are curious about common wagering practices and terms.
Learn to Bet on Sports & Gamble Online & Offline
For starters, you will need somewhere to place bets. If you are in Vegas, great! You can bet at one of the sportsbooks in their casinos. As more and more states pass laws to legalize sports betting, you will also be able to place wagers at local casinos in your area. You could also find a local bookie to bet through, but we recommend betting online.
How Online Betting Works
We have an excellent list of the top places to bet online (that take U.S. customers). If you are looking to maximize your first deposit, we also have a great comparison of the best sportsbooks signup bonuses for you. Once you've read the primer below on reading the odds, you will have no problem navigating these sites.
Las Vegas Sports Betting at the Ticket Window
Betting sports in Vegas is likely going to be the option with the biggest learning curve. You will understand the odds after reading this article, but there are a few other rules and common practices you want to be familiar with that are specific to Vegas.
Many books now offer their own betting apps that make this process a little bit easier, however, the drawbacks are that you must make a deposit upfront for how much you want to bet with, plus you don't get free drink tickets when you place bets on the app. We'll step through how you would place a bet in person at the ticket window.
Step-by-Step Guide to Placing Sports Wagers in Vegas
'I'll take number 403, Cowboys -8, for $110 straight up.'
- Use the rotation number/numbers and the name of the team/teams you want to bet on. The rotation number appears to the left of each team (see image above) and is used as a unique identifier so that there is no confusion about what you want.
- State the amount you would like to bet. This is how much you are wagering, not how much you want to win. Most books use -110 odds (more on this later), so if you want to win $100, you'd state $110 as your wager amount.
- Indicate the type of bet you are placing. For individual bets, just say 'straight' or 'straight up', otherwise you will need to explain that you are taking a parlay or some other bet type.
- Repeat as necessary.
How to Read Sports Betting Lines
There are nearly infinite ways to bet sports. If you can think of something to bet on, there is a good chance you can find somewhere to bet on it. What we are going to focus on is the most common types of wagers: point spreads, over/unders (totals), and money lines.
What Does the Plus (+) and Minus (-) Mean in Sports Betting?
One of the first and most important aspects of sports betting every new player must learn is what the different symbols mean. A plus or a minus can mean different things in different situations. They are used for both point spread and money line betting, as well as for the price/juice of each bet.
This is explained in more detail below, but the most important thing to be aware of is that negative numbers represent favorites, while positive numbers represent underdogs. The same is true whether you are looking at a spread or a moneyline, but how these numbers are used is very different. You also need to know that prices on spreads/totals do not impact who/what is favored, it is used to determine how much the bet pays out. Read on for the complete explanation of each of these concepts.
Point Spreads Explained
The point spread is the projected number of points that separate two teams. A game with a spread will have a favorite (the team expected to win) and an underdog (the team expected to lose). A favorite 'gives' points and is identified with a minus sign next to their point spread. The underdog 'gets' points and is identified with a plus sign next to their point spread.
| Teams | Spread | Price/Vig |
|---|---|---|
| New York Jets | +7 | -110 |
| New England Patriots | -7 | -110 |
In the example above, the point spread is 7 points. Patriots are favored by 7 points against the Jets.
If you bet on the Jets +7, they must either win the game outright or lose by 6 points or less. If they lose by exactly 7 points, the bet is considered a push and is canceled.
If you bet on the Patriots -7, they must win the game outright by more than 7 points. If they win by exactly 7 points, it's a push.
Bet Prices: What Does -110 Mean? If I Bet $100, What do I Win?
The 3-digit numbers to the far right are the listed prices for these bets. This is also called the odds, vig, or juice. An easy way to think of it is the amount you must risk to win $100 on this wager. In our example, -110 means you must risk $110 if you want to win $100. -110 is pretty standard, but you will find different options. We will cover those in more depth when we talk about money lines. The price of the bet has no impact on which team is favored. Only the plus or minus on the point spread matters. This is handled differently when you bet strictly on the moneyline.
What is the Money Line? (How Moneyline Betting Works)
A moneyline bet is on a team to win the game outright (without a point spread) at an adjusted cost. Just like with point spread betting, the favorite will have negative odds, while the underdog will have positive odds. The difference here is in the price or payout depending on which team you take.
| Teams | Moneyline |
|---|---|
| New York Jets | +240 |
| New England Patriots | -280 |
A favorite (e.g. Patriots -280) on the money line works just like our bet price example above. In our new example, the Patriots are listed at -280, meaning you would need to risk $280 for a return of $100 on them. It follows that a winning bet on the Pats pays $100 (plus your initial investment of $280 back). This added risk is why betting the spread is usually more popular, especially on favorites.
Underdogs (e.g. Jets +240) work a bit differently. Instead showing how much you need to risk to win $100, this line tells you how much you stand to win on a $100 wager. That means if you bet $100 on the Jets, and they win, you would win $240. If the Jets lose, you are only out your original $100 wager.
Totals: What Over/Under Means in Sports Betting
The terms 'total' and 'over/under' are synonymous when placing wagers. This type of bet is on the sum of the points scored by both teams in a game. The bookie sets the number for the total, then you predict whether they will score more or less points than the set number.
| Teams | Total | Price/Vig |
|---|---|---|
| New York Jets | Over 42.5 | -105 |
| New England Patriots | Under 42.5 | -115 |
The over/under in this example has been set at 42.5. If you project the Jets and Patriots to combine to score more than 42.5 points, you would place a wager on the over. If you think they will score less than 42.5 points, you would bet the under. Let's say the final score of this game is Patriots 27, Jets 24. Which bet would lose and which bet would win? The sum of all points scored is 27 + 24 = 51, so an over bet wins and an under bet loses.
You may also note the bet price is not -110 like we have seen before. It is common practice by sportsbooks to adjust prices on or around key numbers for spreads and totals, especially in football.
Understanding Sports Betting
We hope this short beginner's guide to understanding and interpreting odds will give you the confidence to get out there and start making winning bets. Our experts are here to help you on this journey, so do not hesitate to contact us with any questions you have about sports betting! We have only scratched the surface on reading betting lines, but this is an excellent place to start.
One sport that has a few extra quirks is golf. I wrote up a guide to golf betting that explains these unique features so you can feel comfortable wagering on PGA events too.
The big board at any Vegas sports book is a sight to behold. A slick cross between the New York Stock Exchange and a McDonald's walk-up menu, the boards are updated moment to moment and bet to bet, giving a sports gambler all the data he needs to make a smart bet.
These boards are copied and pasted into the newspapers or shrunk to fit computer screens and smartphone apps but nothing measures up to the real thing. Hundreds of games, thousands of bets. All listed above you.
The big boards in Vegas tell us many things. The favorites. The underdogs. The payout. Where the money is. Knowing how to read Vegas Odds is important to every gambler not just to place a bet, obviously, but to place a smart bet. And that's all good gamblers want to do. They want to make smart bets, win 60-70 percent of the time, and move on to the next bet.
But how do the big boards in Vegas work? What are they telling us? And what can we derive from them? It is just as important to know the odds you're gambling with as it is to know the sport you're gambling on. Making a smart bet is the goal. And smart gamblers use all the information available in order to do so.
For a brilliant summary for reading Vegas Odds 101, listen to our Sports and Vegas Odds Podcast episode where Ryan breaks it all down for you:
American Odds
Vegas odds are often referred to as 'American Odds' because Americans always have to be different. We ignore the metric system. We call football, soccer. We drive on the wrong side of the road. Why would sports gambling be any different?
American odds are presented in the form of a $100 bet. They'll indicate the amount you need to wager to win $100 or the amount you'll win if you bet $100. So, for a favorite, the odds will begin with a minus (-) sign. This is the amount you need to bet in order to win $100.
On the other hand, the underdog's odds will begin with a plus (+) sign. This is the amount you will receive if you were to bet $100. This does not mean you have to bet $100. Or mean that you can only bet as much as $100. See, Americans have to be different. Hang in there because we have some examples forthcoming.
These odds will come into play a few ways depending on the type of bet you place. The moneyline, the point spread, and the totals (over/under) are all bets available on the board. Let's look at how to read them in Vegas with the odds.
The Moneyline
Simply put, a bet on the moneyline is an odds bet. It's where 'American odds' can easily be seen. With a moneyline bet you're simply picking the winner and the payout is determined by the odds.
Obviously, a bet on the favorite is going to pay out less than a bet on the underdog. Let's look at an example of a moneyline bet with an NBA game and how it would appear in Vegas. The Pacers/Cavs line.
- Indiana Pacers +350
- Cleveland Cavaliers -440
The Pacers are the underdog on the moneyline at +350. The Cavs are the favorites on the moneyline with -440. This means a $100 bet on the Pacers to win pays $350. And that you would have to wager $440 on the Cavs to win $100. This ratio holds true for a wager of any amount. A $10 bet on the Pacers pays $35 while a $10 bet on the Cavs pays $2.27. So on and so forth.
The Point Spread
The most common and popular of sports bets is the point spread. As simply as we can put it, the point spread is the number the oddsmakers use to handicap the favorites to even-up the final score of the game. This in turn sparks more interest, which leads to more bets, which brings in more money. Again, the Pacers/Cavs line.
- Indiana Pacers +8 -110
- Cleveland Cavaliers -8 -110
First the -8. As noted, the Cavs are the favorites so they are giving points (8) to even up the final score. In order for the Cavs to win the bet and cover the point spread, they'd have to win by nine or more. If the Pacers stay within seven points, the Cavs fail to cover the eight points and lose the bet. If the Cavs win by eight points, it's a 'push' or a tie and all bets are returned.
Now the (-110). This number is the odds a bet on the point spread will pay out. Just like on the moneyline, since the Cavs are the favorites, you'll have to bet $110 to win $100. You'll notice a favorite covering the spread pays out much better than a favorite on the moneyline. You'll also notice the favorite and the underdog have the same payouts with the point spread. This is what makes playing the point spread so popular.
Some teams are evenly matched and there isn't a point spread at all. This would be a 'pick'em' or 'pk' on the big board. And the odds on the moneyline would match as well. These are 'EVEN' odds. When playing the point spread the payout number will vary. -110 is about industry standard but you'll notice -105's, -115's, and even as high as -125's on point spread bets at times. More on this later but it is important to note these variations.
Totals
The totals is a bet on the total number of points (or runs or goals) scored in the game. The oddsmakers will set the number and bets are placed on whether or not the total score is OVER or UNDER that number. The number appears on the big board next to the underdog like so:
- Indiana Pacers vs. Cleveland Cavaliers 212.5 -110
The number set for this game is 212.5. Since the .5 has eliminated the chance of a push, an OVER bet will win if the total score is 213 or higher. An UNDER bet pays if the total score is 212 or lower. And, again, the payout for a win is -110.
Totals bets are seen as something of a sucker's bet. Despite your opinion on the matter, we have to admit they are a little strange. You are wagering on what the total score will be. Not picking a winner. Picking a score.
So, it's different than a normal who's-going-to-win-the-game-and-by
-how-much kind of bet. However, this number is providing the gambler more information about how the oddsmakers feel about the game and that is important when making a smart bet.
Placing a Wager
The other set of numbers you will see on the big board are the rotation numbers. These are numbers assigned to teams so the sports book can easily distinguish one for the other. They appear to the left of the teams in a game on the big board as such:
- 101 Indiana Pacers +350 212.5
- 102 Cleveland Cavaliers -440 -8(-110)
How To Read Vegas Lines
These numbers simply help the sports book as well as the gambler keep track of the bet. Listed on the big board are dozens of sports, hundreds of teams and thousands of bets that can be played. It's a good idea to keep them as organized as possible. There are at least six professional teams in New York by itself after all. Like the horses' numbers at the track, rotation numbers just cut down on the confusion when placing a bet.
'Give me New York -220 on the moneyline for $50.'
'Which New York, dumb-dumb…'
'Sorry, 303. I'm an idiot'
'Yes, you are.'
Don't be that guy. This is the proper way to lay a bet in Vegas. Rotation Number, Type of Bet, Amount of Wager. Everyone appreciates a well placed bet and no one likes that guy…
Reading the Big Board
Now that we know how to read Vegas Odds, we need to learn what the Vegas odds mean… That is, what are these numbers telling us in the context of the game we want to wager on. We have studied the teams, we know the rosters. What can the lines tell us to make our bet a smart bet?
Once a game is scheduled and it's odds are posted, the bets are going to start coming in. Now, it's in the sports book's best interest to keep the bets as even as possible. This is why oddsmakers give you a pay out at -110.
Understanding the Vig or Juice
That's a $110 dollar bet to win $100. Take the favorite and give the points. You're paid out at -110. Take the underdog and get the points. You're paid out at -110. OVER or UNDER the same. -110. This is the industry standard and goes back to the mob-only days of oddsmaking.
Where does that $10 bucks go you ask? Well, that $10 bucks on a $100 bet is the 'vig' or 'juice.' It's the price for laying a bet. A little bit extra the oddsmaker gets to keep for fronting the wager.
Keeping the bets as even as they can on either side insures their money. Collect from the losers and short change the winners. It's a brilliant business model only the mob could come up with and only Vegas would still employ.
Now, most betting lines will just give it to you straight. The favorite pays this much, you get this many points, the total is this. What we are looking for are the variations. We can ascertain plenty of valuable intel from these variations.
Vegas Betting Odds Explained
Why is the payout on this game -115? And why is the payout on this game EVEN? Why is the moneyline different from yesterday? And why is the point spread moving up? The devil is in the details.
Watch As The Point Spreads Move
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The most obvious variation is the movement of the point spread. As the bets start coming in, the oddsmakers track which team is receiving most of the betting action. The point spread will move because the oddsmakers will change the line to try to even up the sides. Remember, they want just as many people on one side of a bet as on the other.
More people are taking the Cavs giving the eight points? Raise the point spread to nine. All of a sudden, more bets will come in for the Pacers getting the nine points. Oddsmakers can do the same with the moneyline as well as the total line. And for the same reasons.
But what does this information tell us? The line has moved up even more and now the Cavs are -10 point favorites. This means, despite the oddsmakers best efforts, more wagers have been placed on the Cavs than on the Pacers.
Smart Bettors Know Where The Action Is
Understanding Vegas Betting Odds
Knowing where the money is can help you make a smart bet. One theory is the The-House-Always-Wins-Rule. Basically, this theory suggests you bet against everyone else and with the house because the house always wins. If more people take the favorite, the points they are giving went up and you should take the underdog.
If more people are picking the underdog, the points they are receiving have gone down and you take the favorite. It makes sense in theory but maybe not in practice. Remember, the oddsmakers want the sides to be even.
They aren't in the business of placing their own opposing bets. What is important is knowing how everyone else is betting and the knowledge that a large segment of the gambling population shares your opinion.
Or if you think the gambling population is foolish, well, you know what to do. However you feel, keep an eye on how the line moves. It may help you make a bet you wouldn't have or avoid a bet you were going to make.
A Close Look at the Payouts
The payouts on the point spread can vary as well. That standard -110 will turn into -105's or EVEN's. Or go the other way to -115's, -120's, or -125's. What is the reason for these variations? It's a lot like moving the point spread.
The oddsmakers want to even up the bet. There's only so many points a bookie is going to give. Offering a little more here or a little less there on the payout may be enough to influence the betting action. However, you can tell where the oddsmakers are hedging with these numbers.
The Moneyline
Simply put, a bet on the moneyline is an odds bet. It's where 'American odds' can easily be seen. With a moneyline bet you're simply picking the winner and the payout is determined by the odds.
Obviously, a bet on the favorite is going to pay out less than a bet on the underdog. Let's look at an example of a moneyline bet with an NBA game and how it would appear in Vegas. The Pacers/Cavs line.
- Indiana Pacers +350
- Cleveland Cavaliers -440
The Pacers are the underdog on the moneyline at +350. The Cavs are the favorites on the moneyline with -440. This means a $100 bet on the Pacers to win pays $350. And that you would have to wager $440 on the Cavs to win $100. This ratio holds true for a wager of any amount. A $10 bet on the Pacers pays $35 while a $10 bet on the Cavs pays $2.27. So on and so forth.
The Point Spread
The most common and popular of sports bets is the point spread. As simply as we can put it, the point spread is the number the oddsmakers use to handicap the favorites to even-up the final score of the game. This in turn sparks more interest, which leads to more bets, which brings in more money. Again, the Pacers/Cavs line.
- Indiana Pacers +8 -110
- Cleveland Cavaliers -8 -110
First the -8. As noted, the Cavs are the favorites so they are giving points (8) to even up the final score. In order for the Cavs to win the bet and cover the point spread, they'd have to win by nine or more. If the Pacers stay within seven points, the Cavs fail to cover the eight points and lose the bet. If the Cavs win by eight points, it's a 'push' or a tie and all bets are returned.
Now the (-110). This number is the odds a bet on the point spread will pay out. Just like on the moneyline, since the Cavs are the favorites, you'll have to bet $110 to win $100. You'll notice a favorite covering the spread pays out much better than a favorite on the moneyline. You'll also notice the favorite and the underdog have the same payouts with the point spread. This is what makes playing the point spread so popular.
Some teams are evenly matched and there isn't a point spread at all. This would be a 'pick'em' or 'pk' on the big board. And the odds on the moneyline would match as well. These are 'EVEN' odds. When playing the point spread the payout number will vary. -110 is about industry standard but you'll notice -105's, -115's, and even as high as -125's on point spread bets at times. More on this later but it is important to note these variations.
Totals
The totals is a bet on the total number of points (or runs or goals) scored in the game. The oddsmakers will set the number and bets are placed on whether or not the total score is OVER or UNDER that number. The number appears on the big board next to the underdog like so:
- Indiana Pacers vs. Cleveland Cavaliers 212.5 -110
The number set for this game is 212.5. Since the .5 has eliminated the chance of a push, an OVER bet will win if the total score is 213 or higher. An UNDER bet pays if the total score is 212 or lower. And, again, the payout for a win is -110.
Totals bets are seen as something of a sucker's bet. Despite your opinion on the matter, we have to admit they are a little strange. You are wagering on what the total score will be. Not picking a winner. Picking a score.
So, it's different than a normal who's-going-to-win-the-game-and-by
-how-much kind of bet. However, this number is providing the gambler more information about how the oddsmakers feel about the game and that is important when making a smart bet.
Placing a Wager
The other set of numbers you will see on the big board are the rotation numbers. These are numbers assigned to teams so the sports book can easily distinguish one for the other. They appear to the left of the teams in a game on the big board as such:
- 101 Indiana Pacers +350 212.5
- 102 Cleveland Cavaliers -440 -8(-110)
How To Read Vegas Lines
These numbers simply help the sports book as well as the gambler keep track of the bet. Listed on the big board are dozens of sports, hundreds of teams and thousands of bets that can be played. It's a good idea to keep them as organized as possible. There are at least six professional teams in New York by itself after all. Like the horses' numbers at the track, rotation numbers just cut down on the confusion when placing a bet.
'Give me New York -220 on the moneyline for $50.'
'Which New York, dumb-dumb…'
'Sorry, 303. I'm an idiot'
'Yes, you are.'
Don't be that guy. This is the proper way to lay a bet in Vegas. Rotation Number, Type of Bet, Amount of Wager. Everyone appreciates a well placed bet and no one likes that guy…
Reading the Big Board
Now that we know how to read Vegas Odds, we need to learn what the Vegas odds mean… That is, what are these numbers telling us in the context of the game we want to wager on. We have studied the teams, we know the rosters. What can the lines tell us to make our bet a smart bet?
Once a game is scheduled and it's odds are posted, the bets are going to start coming in. Now, it's in the sports book's best interest to keep the bets as even as possible. This is why oddsmakers give you a pay out at -110.
Understanding the Vig or Juice
That's a $110 dollar bet to win $100. Take the favorite and give the points. You're paid out at -110. Take the underdog and get the points. You're paid out at -110. OVER or UNDER the same. -110. This is the industry standard and goes back to the mob-only days of oddsmaking.
Where does that $10 bucks go you ask? Well, that $10 bucks on a $100 bet is the 'vig' or 'juice.' It's the price for laying a bet. A little bit extra the oddsmaker gets to keep for fronting the wager.
Keeping the bets as even as they can on either side insures their money. Collect from the losers and short change the winners. It's a brilliant business model only the mob could come up with and only Vegas would still employ.
Now, most betting lines will just give it to you straight. The favorite pays this much, you get this many points, the total is this. What we are looking for are the variations. We can ascertain plenty of valuable intel from these variations.
Vegas Betting Odds Explained
Why is the payout on this game -115? And why is the payout on this game EVEN? Why is the moneyline different from yesterday? And why is the point spread moving up? The devil is in the details.
Watch As The Point Spreads Move
The most obvious variation is the movement of the point spread. As the bets start coming in, the oddsmakers track which team is receiving most of the betting action. The point spread will move because the oddsmakers will change the line to try to even up the sides. Remember, they want just as many people on one side of a bet as on the other.
More people are taking the Cavs giving the eight points? Raise the point spread to nine. All of a sudden, more bets will come in for the Pacers getting the nine points. Oddsmakers can do the same with the moneyline as well as the total line. And for the same reasons.
But what does this information tell us? The line has moved up even more and now the Cavs are -10 point favorites. This means, despite the oddsmakers best efforts, more wagers have been placed on the Cavs than on the Pacers.
Smart Bettors Know Where The Action Is
Understanding Vegas Betting Odds
Knowing where the money is can help you make a smart bet. One theory is the The-House-Always-Wins-Rule. Basically, this theory suggests you bet against everyone else and with the house because the house always wins. If more people take the favorite, the points they are giving went up and you should take the underdog.
If more people are picking the underdog, the points they are receiving have gone down and you take the favorite. It makes sense in theory but maybe not in practice. Remember, the oddsmakers want the sides to be even.
They aren't in the business of placing their own opposing bets. What is important is knowing how everyone else is betting and the knowledge that a large segment of the gambling population shares your opinion.
Or if you think the gambling population is foolish, well, you know what to do. However you feel, keep an eye on how the line moves. It may help you make a bet you wouldn't have or avoid a bet you were going to make.
A Close Look at the Payouts
The payouts on the point spread can vary as well. That standard -110 will turn into -105's or EVEN's. Or go the other way to -115's, -120's, or -125's. What is the reason for these variations? It's a lot like moving the point spread.
The oddsmakers want to even up the bet. There's only so many points a bookie is going to give. Offering a little more here or a little less there on the payout may be enough to influence the betting action. However, you can tell where the oddsmakers are hedging with these numbers.
If the payout gets better than -110, the oddsmakers have the sides even up, love the point spread and want you to bet it and lose. If the payout gets worse than -110, the oddsmakers know they have a bad number and want to cut their losses.
Vegas Wants You To Gamble – Be Smart
Making smart bets is the name of the game. The only way to make smart bets is to gather as much information as possible and master how to read Vegas Odds. Get to know every bet as well as you know every team. Get to know all the odds as well as you know every player.
Vegas Betting Odds Explained
Otherwise, you're just playing the lotto. Remember, Vegas wants you to gamble. It's going to give you all the information it can in order to gamble. It's up to you to use it.
Vegas Betting Lines Explained
Test your knowledge on some small starter bets. We'd recommend any of the following for players outside Las Vegas but there are plenty of good options for US players (just make sure it's not illegal in your state):
