How Expected Value Works in Sports Betting

by Daniel Price from
How Expected Value Works in Sports Betting

There are many aspects to sports betting and when it comes to making a profit, knowing how expected value works in sports betting is key. Expected value in sports betting is known as EV and there is both positive EV and negative EV. On this page, we will answer the question what is positive expected value in sports betting and look at how to calculate expected value in sports betting.

1. What is Expected Value in Betting

Sports betting expected value can be defined simply as the difference between the bookmaker’s expectations and the bettor’s expectations from a bet. This builds a picture of whether the odds are in your favour or not. To use expected value in sports betting, you must know how to calculate the probability of a potential outcome of a sporting event and compare that with the odds presented by the bookmaker.

By using expected value in sports betting, you can assess if a bet has a statistical advantage in your favour (positive EV) or the bookmaker has the edge (negative EV). By understanding how expected value works in sports betting, you can place better bets and outperform casual gamblers who are failing to evaluate the value of a bet before having a wager.

2. Why Expected Value Is Important for Smarter Sports Bets

Now you know what is expected value in sports betting, you may have an idea of why it is important. For the casual gambler who has the occasional small wager, sports betting is a bit of fun, with some wins and some losses. For serious sports bettors who bet regularly and often with large sums, any advantage over the bookmaker is crucial.

How expected value works in betting is that it measures the average outcome of a bet if it was placed multiple times. It will tell you if the bet is likely to win or lose in the long term. That is why it is a vital part of the arsenal of any serious sports bettor and can provide long term success.

Expected value in sports betting also allows you to calculate if the potential payout justifies the value of the risk. Just because odds look tempting, does not mean they are providing any value and the bookmaker could still have the edge. That is something you can try and avoid when learning how expected value works in sports betting. Additionally, it’s also important to understand key concepts, like clean sheet meaning in betting 101

3. How to Calculate Expected Value in Sports Betting

Knowing how to calculate EV in sports betting is crucial if you want to understand and implement expected value into your sports betting. The expected value calculation for sports betting is:

EV = (Probability of Winning × Amount Won per Bet) – (Probability of Losing × Amount Lost per Bet)

You must do your own research to calculate the percentage chance of an outcome. That means using historical statistics and current data. For example, having conducted thorough research you believe a football team has a 65% chance of winning and their odds are 2.10. Let’s break it down using the calculation based on a $100 stake:

(Probability of winning) 0.65 x (amount won per bet) $110 – (probability of losing) 0.35 x (amount loss per bet) $100 =

71.5 – 35 = 36.5

That means $36.5 per $100 wagered, which is a positive EV bet and that it has an advantage, statistically, over the bookmaker. This is just an example of the how expected value calculation works and in most cases, the probability of winning will be lower. For markets that are less predictable, understanding EV can be especially helpful in spotting value. Find out the latest tips in our novelty and specials betting all you need to know guide.

4. Positive vs Negative Expected Value in Betting

The example above shows positive expected value in betting. Any calculation that shows a value above 0 is a positive EV bet and you will want to bet more on these to maximize profit. Any calculation that shows a value below 0 is a negative value bet and is one to avoid. Even if you have a feeling in your gut that you know what will happen, if you consistently place wagers on negative EV bets, you will lose money in the long term.

Knowing how to use expected value in sports betting is not a short term strategy because even positive EV bets will lose. However, by using the EV sports betting calculator and your formula to work out the probability of winning, you will consistently have your money in good bets.

5. Tips for Finding +EV Bets in Sports Betting Markets

Below we have our top tips for finding positive expected value bets in sports betting markets. You can use these as a quick guide:

  • Always bet where there is value
  • Keep emotion out
  • Stay consistent with your probability of winning formula
  • Check odds early in the week because that is where the best value is often found
  • Maintain a long term mindset

As with any form of gambling, there is always a chance a bet, even a positive EV bet can lose. This can lead to short term losses and your probability assessment must be accurate, which can take time to perfect. However, knowing how expected value works in sports betting is a big step on the road to becoming a smarter bettor. Tools like promotions or using a 1XBET sports referral code can also offer extra value when placing your bets.

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6. Expected Value Betting Guide 2025 - FAQ

6.1 📌 How do you know if a bet has positive expected value?

A bet has positive EV when your estimated probability of winning is higher than what the odds imply. You’re getting better value than the true chances suggest.

6.2 🍀 Are wins guaranteed with positive EV bets?

No. Positive EV improves your odds over time, but it doesn’t guarantee short-term wins. It’s a long-term strategy that beats the odds through consistent value, not certainty.

6.3 ❓Why do “safe” bets still lead to long-term losses?

Because even bets that seem likely to win can be overpriced by the sportsbook. If the potential payout doesn’t justify the risk, you’re losing value with every wager. That’s exactly how expected value works in sports betting.

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