What Do Plus and Minus Odds Mean Before Betting?

At -150, a bettor must risk $150 to make $100 in net profit. A winning $150 bet returns $250 total: the original $150 stake plus $100 in winnings. If it loses, the potential loss is $150. The money risked is not automatically a loss—it becomes one only if the wager fails.

For any stake, use:

Profit = stake × (100 ÷ absolute value of the odds)

A $60 bet at -150 produces:

$60 × (100 ÷ 150) = $40 profit

The total return would be $100. More negative prices, such as -200 rather than -120, generally indicate higher market expectations for that outcome. They also deliver less profit relative to the amount staked; market confidence is implied, not certainty.

At +200, a $100 wager can earn $200 in net profit. If successful, the sportsbook returns $300 total, including the original stake. If unsuccessful, the potential loss remains the $100 stake—not $200.

For a flexible stake, use:

Profit = stake × (odds ÷ 100)

A $25 bet at +200 therefore earns:

$25 × (200 ÷ 100) = $50 profit

The total return would be $75. Positive odds commonly identify an underdog, but the plus sign does not always mean an underdog in the usual team-versus-team sense. It also appears on player props, futures, exact-score wagers, and alternative markets where the selected result is considered less likely.

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In Team A +3 (-110), “+3” is the spread: three points are added to Team A’s score for grading. “-110” is the price, meaning a $110 winning stake earns $100 in profit. The plus sign on the spread does not describe the payout odds.

Likewise, Over 47.5 (-105) contains two separate instructions. More than 47.5 total points must be scored for the bet to win, while a $105 stake would earn $100 profit. The half-point prevents a tie because a final score cannot total half a point.

Pushes and voids

A Team A +3 bet pushes if Team A loses by exactly three. The sportsbook normally returns the stake with no profit or loss. A void—perhaps caused by a cancellation or an unmet participation rule—is generally handled the same way.

The attached price matters only when the wager is graded as a win or loss. On a push or void, it does not change the returned stake, although house rules should always be checked.

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American odds can be converted into the winning percentage needed to break even before fees or other pricing effects. This process helps turn betting odds into implied probability.

For negative odds, divide the number without its minus sign by that number plus 100:

• -150: 150 ÷ (150 + 100) = 0.60, or 60%

For positive odds, divide 100 by the quoted number plus 100:

• +200: 100 ÷ (200 + 100) = 0.333, or about 33.3%

These percentages are useful break-even benchmarks. A -150 wager must win more than 60% of the time to be profitable over many identical bets, while +200 must win more than 33.3% of the time.

However, implied probability is not a pure forecast. Sportsbooks build a margin, often called the vig, into their prices. For example, two sides priced at -110 each imply roughly 52.4% apiece, totaling 104.8%; the amount above 100% reflects the bookmaker’s margin.

Value therefore depends on whether the bettor’s estimated probability beats the market’s break-even percentage. A negative price can offer value if the true chance is underestimated, while a positive price can be poor value if the outcome is less likely than its odds suggest.

A stake is the amount placed at risk. Profit is the net amount won, while total return combines that profit with the returned stake. Using the same $100 stake makes the effect of different prices easy to compare.

The calculation can also run in reverse when a specific profit is the goal:

• Negative odds: required stake = desired profit × (absolute odds ÷ 100). To win $50 at -150, the stake is $75.
• Positive odds: required stake = desired profit × (100 ÷ odds). To win $50 at +200, the stake is $25.

Reading the bet slip

A risk field asks how much money will be staked. A to win field asks for the desired net profit and calculates the required risk automatically. Entering $100 into “to win” at -150 therefore creates a $150 stake, not a $100 stake.

Rounding and interface labels can vary, so it is sensible to check the displayed payout before confirming the bet. The slip should clearly show the risk, potential profit, and total payout.

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Odds should be compared only for the identical selection and market: the same team or player, bet type, spread or total, settlement rules, and timing. A -105 price is not necessarily better than -115 if the two wagers carry different point spreads.

For the same selection, -105 is preferable to -115. Winning $100 requires stakes of $105 and $115 respectively—a $10 difference. With a fixed $100 stake, the profits are about $95.24 and $86.96.

A straight bet has one price and one grading outcome. A parlay combines several legs into one payout, but usually loses if any required leg fails. That distinction matters when comparing the risk of straight bets and parlays.