Home » Sport Betting Guides » What is a Kelly multiplier in sports betting?

Sports betting has become increasingly popular in recent years, with millions of people placing bets on various sports events across the globe. However, making a profit from sports betting can be challenging, as it requires more than just guessing the outcome of a match. Successful sports bettors use a range of strategies to increase their chances of winning, and one of the most popular of these strategies is the Kelly multiplier.

The Kelly multiplier, also known as the Kelly criterion, is a mathematical formula that is used to determine the optimal bet size for a particular wager. It was developed by John Kelly, a scientist at Bell Labs, in the 1950s, and has since become a popular tool among professional sports bettors.

The Kelly criterion is based on the idea of maximizing expected value, or the amount of money a bettor can expect to win on average for each bet.

**The formula for the Kelly criterion is as follows:**

f* = (bp – q) / b

**Where:**

- f* = the optimal fraction of your bankroll to wager on a given bet
- b = the odds received on the bet (in decimal format)
- p = the probability of winning the bet
- q = the probability of losing the bet (1 – p)

The Kelly criterion suggests that the optimal bet size is determined by the size of the bankroll, the odds of the bet, and the probability of winning. In other words, the Kelly multiplier tells you how much of your bankroll you should risk on a bet, based on the odds and the probability of winning.

For example, let’s say you have a bankroll of $1,000 and you want to bet on a tennis match between Rafael Nadal and Novak Djokovic. The odds for Nadal to win are 1.80 (in decimal format), and you believe he has a 60% chance of winning.

**Using the Kelly criterion, you would calculate the optimal bet size as follows:**

f* = (1.80 x 0.60 – 0.40) / 1.80 = 0.10

**This means that the optimal bet size for this wager is 10% of your bankroll, or $100.**

It’s important to note that the Kelly criterion is not foolproof and should be used in conjunction with other betting strategies. Additionally, the Kelly criterion assumes that the probabilities and odds are accurate, which may not always be the case.

Kelly criterion value betting is a strategy that involves finding bets with positive expected value and using the Kelly criterion to determine the optimal bet size. Positive expected value (EV) means that a bet has a higher probability of winning than the odds suggest, making it a potentially profitable bet.

To find bets with positive EV, you need to do some research and analysis to identify opportunities where the odds are mispriced or undervalued. For example, if you think that a particular team has a higher chance of winning than the odds suggest, you may want to consider placing a bet on that team.

Once you have identified a bet with positive expected value, you can use the Kelly criterion to determine the optimal bet size. The Kelly criterion takes into account the size of your bankroll, the odds, and the probability of winning to give you the optimal bet size that maximizes your expected value.

Using Kelly criterion value betting can be a profitable strategy if done correctly, but it requires discipline and patience. It’s important to note that not all bets with positive expected value will win, so it’s important to manage your bankroll and not bet more than you can afford to lose.

In conclusion, the Kelly multiplier is a powerful tool that can help sports bettors make more informed and profitable betting decisions. By using the Kelly criterion formula to determine the optimal bet size, you can maximize your expected value and increase your chances of making a profit.

However, it’s important to use the Kelly criterion in conjunction with other betting strategies and to manage your bankroll carefully. With discipline and patience, the Kelly multiplier can be a valuable addition to your sports betting arsenal.

The Kelly multiplier, also known as the Kelly criterion, is a mathematical formula used to determine the optimal bet size for a particular wager. It takes into account the size of the bankroll, the odds of the bet, and the probability of winning.

Expected value is the amount of money a bettor can expect to win on average for each bet. In sports betting, it is calculated by multiplying the probability of winning by the potential payout in case of a win, and subtracting the probability of losing multiplied by the amount risked.

Kelly criterion value betting is a strategy that involves finding bets with positive expected value and using the Kelly criterion to determine the optimal bet size. Positive expected value means that a bet has a higher probability of winning than the odds suggest, making it a potentially profitable bet.

To calculate the optimal bet size using the Kelly criterion, you need to know the probability of winning, the decimal odds offered by the sportsbook, and the bankroll size. Then, use the formula **f* = (bp – q) / b** to calculate the optimal bet size as a percentage of bankroll.

The **Kelly Criterion Calculator** we offer is a beneficial tool for sports bettors who wish to make informed betting decisions that result in increased profitability.

No, the Kelly multiplier is not foolproof and should be used in conjunction with other betting strategies. Additionally, the Kelly criterion assumes that the probabilities and odds are accurate, which may not always be the case.

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