FAQ

Positive expected value bets (or +EV bets, from the English expected value) are those in which the mathematical probability of winning and the potential profit exceed the cost of the bet. In other words, these are bets that will bring profit in the long term, even if the specific results may be unpredictable.

A particular case of positive expected value bets is betting on overvalued odds (value bets).

Bets with positive expected value (or +EV bets, from the English expected value) are those in which the mathematical probability of winning and the potential profit exceed the cost of the bet. In other words, these are bets that will bring you profit in the long term, even if the specific results may be unpredictable.

A particular case of bets with positive expected value is betting on overvalued odds (value bets).

Fractional odds

• Where popular: The UK and Ireland.
• Format: Expressed as fractions, for example, 5/2 or 10/1.
• How they work: The first number shows how much you can win if you stake an amount equal to the second number. For example, odds of 5/2 mean that for every 2 units staked, you will earn 5 units of profit. If you bet 2 dollars at odds of 5/2 and the bet wins, you will receive 5 dollars in profit plus the returned 2 dollars stake, for a total of 7 dollars.

Decimal odds

• Where popular: Europe, Russia, Canada, Australia, New Zealand.
• Format: Presented as decimal numbers, such as 1.50, 2.75, or 10.00.
• How they work: To calculate the total payout (including your stake), you multiply your bet by the decimal odds. For example, odds of 2.75 mean that if you place a 10-dollar bet, your total payout will be 10 × 2.75 = 27.5 dollars (17.5 dollars profit plus 10 dollars stake returned).

American odds (Moneyline odds)

• Where popular: The USA.

• Format: Presented with positive or negative numbers, for example, +150 or -200.

• How they work:

• Negative odds: Show how much you need to bet to win 100 dollars. For example, odds of -200 mean you need to bet 200 dollars to win 100 dollars in profit. The total payout will be 300 dollars (100 dollars profit plus 200 dollars stake).
• Positive odds: Show how much you can win if you bet 100 dollars. For example, odds of +150 mean that a 100-dollar bet will bring you 150 dollars in profit. The total payout will be 250 dollars (150 dollars profit plus 100 dollars stake).

Comparison example:

• A fractional odds of 2/1 means you will get 2 dollars in profit for every 1 dollar bet.
• A decimal odds of 3.00 means your total payout will be 3 times your stake (2 dollars profit for every 1 dollar bet).
• American odds of +200 mean a 100-dollar bet will earn you 200 dollars in profit.

Comparison for a single outcome:

• Fractional odds: 2/1.
• Decimal odds: 3.00.
• American odds: +200.
  All three systems show the same thing—a doubling of your stake if you win, but with different approaches to calculation and presentation of information.

Formula for converting odds

Decimal odds = Fractional odds + 1,
Where the fractional odds are written as a fraction A/B, where:

• A is the numerator,
• B is the denominator.

Example: If the fractional odds are 5/2, the decimal odds will be:
Decimal odds = 5/2 + 1 = 2.5 + 1 = 3.5.

Converting American odds to decimal

There are two formulas, depending on whether the American odds are positive or negative.

• If the American odds are positive (+X):
  Decimal odds = 1 + X/100
  Example: American odds of +150:
  Decimal odds = 1 + 150/100 = 1 + 1.5 = 2.5.

• If the American odds are negative (−X):
  Decimal odds = 1 + 100/X
  Example: American odds of −200:
  Decimal odds = 1 + 100/200 = 1 + 0.5 = 1.5.

Summary

• For fractional odds, add 1 to the result of the fraction.
• For positive American odds, divide by 100 and add 1.
• For negative American odds, divide 100 by the absolute value of the odds and add 1.

Fractional odds (Fractional odds)

• Where they are popular: Great Britain and Ireland.

• Format: Expressed as fractions, e.g. 5/2 or 10/1.

• How they work: The first number shows how much you win when you bet an amount equal to the second number. For example, odds of 5/2 mean that for every 2 units staked, you receive 5 units in winnings. If you bet 2 dollars at odds of 5/2 and the bet wins, you receive 5 dollars in winnings plus your 2-dollar stake back, for a total of 7 dollars.

Decimal odds (Decimal odds)

• Where they are popular: Europe, Russia, Canada, Australia, New Zealand.
• Format: Represented as decimal numbers, such as 1,50, 2,75 or 10,00.
• How they work: To calculate the total payout (including the stake), multiply the stake by the decimal odds. For example, odds of 2,75 mean that a 10-dollar stake produces a payout of 10 × 2,75 = 27,5 dollars (17,5 dollars in winnings and a 10-dollar stake return).

American odds (Moneyline odds)

• Where they are popular: USA.
• Format: Represented with positive or negative numbers, e.g. +150 or -200.
• How they work:
• Negative odds: Show how much you need to bet to win 100 dollars. For example, odds of -200 mean that you need to bet 200 dollars to receive 100 dollars in winnings. The total payout is 300 dollars (100 dollars in winnings plus a 200-dollar stake).
• Positive odds: Show how much you win when you bet 100 dollars. For example, odds of +150 mean that a 100-dollar stake produces 150 dollars in winnings. The total payout is 250 dollars (150 dollars in winnings plus a 100-dollar stake).

Comparison example

• Fractional odds of 2/1 mean that you receive 2 dollars in winnings for every dollar staked.
• Decimal odds of 3,00 mean that the total payout is three times the stake (2 dollars in winnings for every dollar staked).
• American odds of +200 mean that a 100-dollar stake produces 200 dollars in winnings.

Comparison for a single outcome:

• Fractional odds: 2/1.
• Decimal odds: 3,00.
• American odds: +200.
  All three systems show the same thing – a doubling of the stake when winning, but with different calculation and presentation approaches.

Formula for converting odds

Decimal odds = fractional odds + 1,
where the fractional odds are written as a fraction A/B, where:

• A is the numerator,
• B is the denominator.

Example: If the fractional odds are 5/2, the decimal odds are:
Decimal odds = 5/2 + 1 = 2,5 + 1 = 3,5.

Converting American odds to decimal odds

There are two formulas, depending on whether the American odds are positive or negative.

• If the American odds are positive (+X):
  Decimal odds = 1 + X/100
  Example: American odds +150:
  Decimal odds = 1 + 150/100 = 1 + 1,5 = 2,5.

• If the American odds are negative (−X):
  Decimal odds = 1 + 100/X
  Example: American odds −200:
  Decimal odds = 1 + 100/200 = 1 + 0,5 = 1,5.

Summary

• For fractional odds, add 1 to the result of the fraction.

• For positive American odds, divide by 100 and add 1.

• For negative American odds, divide 100 by the absolute value of the odds and add 1.

Fractional odds (Fractional odds)

• Where they are popular: United Kingdom and Ireland.

• Format: Expressed as fractions, for example 5/2 or 10/1.

• How they work: The first number indicates how much you can win if you bet an amount equal to the second number. For example, odds of 5/2 mean that for every 2 units bet, you win 5 units in profit. If you bet 2 dollars at odds of 5/2 and the bet wins, you will receive 5 dollars in profit plus your 2-dollar stake, for a total of 7 dollars.

Decimal odds (Decimal odds)

• Where they are popular: Europe, Russia, Canada, Australia, New Zealand.
• Format: Presented as decimal numbers, such as 1,50, 2,75 or 10,00.
• How they work: To determine the total payout (including the return of the stake), you must multiply the stake by the decimal odds. For example, odds of 2,75 mean that if you bet 10 dollars, your total payout will be 10 × 2,75 = 27,5 dollars (17,5 dollars in profit and 10 dollars of stake returned).

American odds (Moneyline odds)

• Where they are popular: United States.
• Format: Presented with positive or negative numbers, for example +150 or -200.
• How they work:
• Negative odds: They indicate how much you need to bet to win 100 dollars. For example, odds of -200 mean that you need to bet 200 dollars to obtain 100 dollars in profit. The total payout will be 300 dollars (100 dollars in profit plus 200 dollars of stake).
• Positive odds: They indicate how much you can win if you bet 100 dollars. For example, odds of +150 mean that a bet of 100 dollars will bring you 150 dollars in profit. The total payout will be 250 dollars (150 dollars in profit plus 100 dollars of stake).

Comparison example 

• Fractional odds of 2/1 mean that you will win 2 dollars in profit for every dollar bet.
• Decimal odds of 3,00 mean that the total payout will be 3 times the stake (2 dollars in profit for every dollar bet).
• American odds of +200 mean that a bet of 100 dollars will bring you 200 dollars in profit.

Comparison for a single outcome 

• Fractional odds: 2/1.
• Decimal odds: 3,00.
• American odds: +200.
  All three systems show the same thing: a doubling of your stake in the event of a win, but with different approaches to calculating and presenting the information.

Formula for converting odds 

Decimal odds = Fractional odds + 1,
Where the fractional odds are expressed as a fraction A/B, where:

• A is the numerator,
• B is the denominator.

Example: If the fractional odds are 5/2, the decimal odds will be:
Decimal odds = 5/2 + 1 = 2,5 + 1 = 3,5.

Converting American odds to decimal odds

There are two formulas, depending on whether the American odds are positive or negative.

• If the American odds are positive (+X):
  Decimal odds = 1 + X/100
  Example: American odds of +150:
  Decimal odds = 1 + 150/100 = 1 + 1,5 = 2,5.

• If the American odds are negative (−X):
  Decimal odds = 1 + 100/X
  Example: American odds of −200:
  Decimal odds = 1 + 100/200 = 1 + 0,5 = 1,5.

Summary 

• For fractional odds, add 1 to the result of the fraction.
• For positive American odds, divide by 100 and add 1.
• For negative American odds, divide 100 by the absolute value of the odds and add 1.

Fractional odds (Fractional odds)

• Where they are popular: United Kingdom and Ireland.

• Format: They are expressed as fractions, for example, 5/2 or 10/1.

• How they work: The first number shows how much you can win if you bet an amount equivalent to the second number. For example, odds of 5/2 mean that for every 2 units bet, you will win 5 units in profit. If you bet 2 dollars at odds of 5/2 and the bet wins, you will receive 5 dollars in profit plus the 2 dollars bet, for a total of 7 dollars.

Decimal odds (Decimal odds)

• Where they are popular: Europe, Russia, Canada, Australia, New Zealand.
• Format: They are presented as decimal numbers, such as 1.50, 2.75 or 10.00.
• How they work: To determine the total payout (including the return of the bet), you must multiply the bet by the decimal odds. For example, decimal odds of 2.75 mean that if you bet 10 dollars, your total payout will be 10 × 2.75 = 27.5 dollars (17.5 dollars in profit and 10 dollars returned from the bet).

American odds (Moneyline odds)

• Where they are popular: United States.

• Format: They are presented with positive or negative numbers, for example, +150 or -200.

• How they work:
• Negative odds: They show how much you must bet to win 100 dollars. For example, odds of -200 mean that you must bet 200 dollars to win 100 dollars in profit. The total payout will be 300 dollars (100 dollars in profit plus the 200 dollars bet).
• Positive odds: They show how much you can win if you bet 100 dollars. For example, odds of +150 mean that a 100-dollar bet will give you 150 dollars in profit. The total payout will be 250 dollars (150 dollars in profit plus the 100 dollars bet).

Comparison example

• Fractional odds of 2/1 mean that you will get 2 dollars in profit for every dollar bet.
• Decimal odds of 3.00 mean that the total payout will be 3 times the value of the bet (2 dollars in profit for every dollar bet).
• American odds of +200 mean that a 100-dollar bet will give you 200 dollars in profit.

Comparison for a single outcome:

• Fractional odds: 2/1.
• Decimal odds: 3.00.
• American odds: +200.
  All three systems show the same thing: doubling your bet in the event of a win, but with different approaches to calculating and presenting the information.

Formula for converting odds

Decimal odds = Fractional odds + 1,
Where the fractional odds are expressed as A/B, where:

• A is the numerator,
• B is the denominator.

Example: If the fractional odds are 5/2, the decimal odds will be:
Decimal odds = 5/2 + 1 = 2.5 + 1 = 3.5.

Converting American odds to decimal odds

There are two formulas, depending on whether the American odds are positive or negative.

• If the American odds are positive (+X):
  Decimal odds = 1 + X/100
  Example: American odds of +150:
  Decimal odds = 1 + 150/100 = 1 + 1.5 = 2.5.

• If the American odds are negative (−X):
  Decimal odds = 1 + 100/X
  Example: American odds of −200:
  Decimal odds = 1 + 100/200 = 1 + 0.5 = 1.5.

Summary

• For fractional odds, add 1 to the result of the fraction.
• For positive American odds, divide them by 100 and add 1.
• For negative American odds, divide 100 by the absolute value of the odds and add 1.

Fractional odds (Fractional odds)

• Where they are popular: United Kingdom and Ireland.

• Format: Expressed as fractions, for example, 5/2 or 10/1.

• How they work: The first number shows how much you can win if you bet an amount equal to the second number. For example, odds of 5/2 mean that, for every 2 units bet, you will earn 5 units in profit. If you bet 2 dollars at odds of 5/2 and the bet wins, you will receive 5 dollars in profit, plus the 2 dollars of your bet, totaling 7 dollars.

Decimal odds (Decimal odds)

• Where they are popular: Europe, Russia, Canada, Australia, New Zealand.
• Format: Presented as decimal numbers, such as 1,50, 2,75 or 10,00.
• How they work: To calculate the total payout (including the return of the bet), you must multiply your bet by the decimal odds. For example, odds of 2,75 mean that, if you bet 10 dollars, the total payout will be 10 × 2,75 = 27,5 dollars (17,5 dollars in profit and 10 dollars returned from the bet).

American odds (Moneyline odds)

• Where they are popular: USA.
• Format: Presented with positive or negative numbers, for example, +150 or -200.
• How they work:
• Negative odds: Indicate how much you must bet to win 100 dollars. For example, odds of -200 mean that you need to bet 200 dollars to win 100 dollars in profit. The total payout will be 300 dollars (100 dollars in profit plus the 200 dollars of the bet).
• Positive odds: Indicate how much you can win if you bet 100 dollars. For example, odds of +150 mean that a bet of 100 dollars will generate 150 dollars in profit. The total payout will be 250 dollars (150 dollars in profit plus the 100 dollars of the bet).

Comparison example

• Fractional odds of 2/1 mean that you will earn 2 dollars in profit for every 1 dollar bet.
• Decimal odds of 3,00 mean that the total payout will be 3 times the bet amount (2 dollars in profit for every 1 dollar bet).
• American odds of +200 mean that a bet of 100 dollars will give you 200 dollars in profit.

Comparison for a single outcome

• Fractional odds: 2/1.
• Decimal odds: 3,00.
• American odds: +200.
  All three systems show the same result – doubling your bet in the event of a win, but with different approaches to calculating and presenting the information.

Formula for converting odds

Decimal odds = Fractional odds + 1,
Where fractional odds are expressed as a fraction A/B, where:

• A is the numerator,
• B is the denominator.

Example: If the fractional odds are 5/2, the decimal odds will be:
Decimal odds = 5/2 + 1 = 2,5 + 1 = 3,5.

Converting American odds to decimal odds

There are two formulas, depending on whether the American odds are positive or negative.

• If the American odds are positive (+X):
  Decimal odds = 1 + X/100
  Example: American odds of +150:
  Decimal odds = 1 + 150/100 = 1 + 1,5 = 2,5.

• If the American odds are negative (−X):
  Decimal odds = 1 + 100/X
  Example: American odds of −200:
  Decimal odds = 1 + 100/200 = 1 + 0,5 = 1,5.

Summary

• For fractional odds, add 1 to the result of the fraction.
• For positive American odds, divide by 100 and add 1.
• For negative American odds, divide 100 by the absolute value of the odds and add 1.

Fractional odds

• Where they are popular: United Kingdom and Ireland.

• Format: Expressed as fractions, for example 5/2 or 10/1.
• How they work: The first figure indicates how much you can win if you bet an amount equal to the second figure. For example, odds of 5/2 mean that for every 2 units bet, you will receive 5 units of profit. If you bet 2 dollars at odds of 5/2 and win, you will receive 5 dollars in winnings plus the 2 dollars of your bet, for a total of 7 dollars.

Decimal odds

• Where they are popular: Europe, Russia, Canada, Australia, New Zealand.
• Format: Represented as decimal numbers, for example 1.50, 2.75 or 10.00.
• How they work: To determine the total winnings (including the return of the bet), you need to multiply the bet by the decimal odds. For example, odds of 2.75 mean that if you bet 10 dollars, the total winnings will be 10 × 2.75 = 27.5 dollars (17.5 dollars in net profit and 10 dollars returned from the bet).

American odds (Moneyline odds)

• Where they are popular: United States.
• Format: Represented by positive or negative numbers, for example +150 or -200.
• How they work:
• Negative odds: Indicate how much you need to bet to win 100 dollars. For example, odds of -200 mean that you need to bet 200 dollars to obtain 100 dollars in net profit. The total winnings will be 300 dollars (100 dollars in winnings plus the 200 dollars of the bet).
• Positive odds: Indicate how much you can win if you bet 100 dollars. For example, odds of +150 mean that a bet of 100 dollars will give you a net profit of 150 dollars. The total winnings will be 250 dollars (150 dollars in profit plus the 100 dollars of the bet).

Comparison example:

• Fractional odds of 2/1 mean that you will receive 2 dollars in net profit for every 1 dollar bet.
• Decimal odds of 3.00 mean that the total winnings will be 3 times the bet (2 dollars in net profit on 1 dollar bet).
• American odds of +200 mean that a bet of 100 dollars will give you a net profit of 200 dollars.

Comparison for a single outcome:

• Fractional odds: 2/1.
• Decimal odds: 3.00.
• American odds: +200.

All three systems show the same result: a doubling of your bet in the event of a win, but with different approaches to calculating and presenting the information.

Formula for converting odds:

Decimal odds = Fractional odds + 1,
Where the fractional odds are expressed as A/B, where:

• A is the numerator,
• B is the denominator.

Example: If the fractional odds are 5/2, the decimal odds will be:
Decimal odds = 5/2 + 1 = 2.5 + 1 = 3.5.

Converting American odds to decimal odds

There are two formulas, depending on whether the American odds are positive or negative.

• If the American odds are positive (+X):
  Decimal odds = 1 + X/100
  Example: American odds +150:
  Decimal odds = 1 + 150/100 = 1 + 1.5 = 2.5.

• If the American odds are negative (−X):
  Decimal odds = 1 + 100/X
  Example: American odds −200:
  Decimal odds = 1 + 100/200 = 1 + 0.5 = 1.5.

Conclusions

• For fractional odds, 1 is added to the result of the fraction.
• For positive American odds, divide by 100 and add 1.
• For negative American odds, divide 100 by the absolute value of the odds and add 1.

Moneyline is an American term equivalent to the European concept of "match market." It means that the bet is placed on the outcome of a game or match. The labels "1" and "2" refer to the results: 1 for the first opponent, 2 for the second.

The 12 Moneyline market is used in sports, events, and matches where only two outcomes are possible, and a draw is excluded.

A clear and simple example of a sport where only the 12 Moneyline market is available is tennis, where only a win by the first or second opponent is possible. 12 Moneyline bets are also offered for final results, including overtime or shootouts, in sports like hockey, basketball, and American football.

If the game ends in a tie at the end of regular time when using the 12 Moneyline market, your bet remains active until a winner is determined in overtime, extra innings, or a shootout.

This lower level of risk is often reflected in the betting odds. Theoretically, when betting on the 1x2 market, you have a 33% chance of winning, as there are three possible outcomes. By eliminating the draw and choosing between two outcomes, the chance of winning increases to 50%. Therefore, odds on such markets are lower due to the reduced risk for the bettor and increased risk for the bookmaker.

Pros and cons of 12 Moneyline bets:

• Moneyline bets are the most popular, and every bookmaker, even with a modest offering, includes Moneyline bets.
• Moneyline bets usually offer the highest possible betting limits and good market liquidity for most sports and leagues, making them equally suitable for both professional and casual bettors.
• In some sports, such as tennis, depending on the bookmaker's rules, if only one set is played and the athlete wins it but then withdraws due to injury, the loss will be attributed to that player, and thus to the bet on them.
• Moneyline odds are the most carefully and accurately evaluated compared to other sports betting markets. Therefore, they are less suitable for finding overvalued odds (value bets).

Conclusion on 12 Moneyline bets:

It is reasonably believed that in this type of betting, the probability of winning is higher than in bets with three possible outcomes. To win the bet, the selected team must win the game, regardless of whether it happens in regular time, overtime, or after penalties or shootouts.

If the game is tied at the end of regular time, the bet is not settled yet; it's neither a loss nor a refund—wait for the match's outcome after overtime, etc.

P.S. There is a separate 1x2 Moneyline market, where a draw is also included, marked as "X." The results of bets are calculated based on the outcome of regular time (four quarters in basketball, three periods in hockey, or nine innings in American football). This market is often called the "main outcome."