You like a team tonight. One sportsbook offers −110. Another offers −125 for the same team in the same market. It feels like a small difference. It is the same game, after all.
But you are buying a different price. The second offer pays less for the same risk. Do that often enough, and the difference matters much more than it does on a single slip.
You do not need complicated math to spot it. Start with the payout, turn the price into a break-even chance, and compare the exact same bet.
What plus and minus odds mean
American odds use $100 as a reference amount. +150 means a $100 winning bet earns $150 profit. You also get your $100 stake back, so the total return is $250. −150 means you risk $150 to earn $100 profit. Its winning total return is also $250.
You do not have to bet $100 or $150. The amounts scale. A $20 stake at +150 earns $30 profit. A $20 stake at −150 earns about $13.33 profit. Those definitions match DraftKings' official odds guide.
A plus sign does not make a bet better, and a minus sign does not make it safer. They tell you the price. Whether that price is worth taking depends on the chance of winning.
Turn the price into a break-even chance
Break even means you neither gain nor lose money over many bets at that price. Here is the simple rule:
- For negative odds, divide the number without its minus sign by that number plus 100.
- For positive odds, divide 100 by the number plus 100.
At −110, the calculation is 110 ÷ 210, or about 52.4%. At +150, it is 100 ÷ 250, or 40%.
| Odds | Profit if it wins | Break-even win rate |
|---|---|---|
| −150 | $13.33 | 60.0% |
| −125 | $16.00 | 55.6% |
| −110 | $18.18 | 52.4% |
| +100 | $20.00 | 50.0% |
| +150 | $30.00 | 40.0% |
| +200 | $40.00 | 33.3% |
These examples assume every bet wins or loses. A push returns the stake and changes how you count settled bets. A void or a promotional bet can follow different payout rules.
Why both sides can add up to more than 100%
Imagine a two-sided market with −110 on each side. Each price implies about 52.4%. Together, they add up to about 104.8%.
Both sides cannot have a true 52.4% chance in a simple market where exactly one side wins. The extra amount comes from the margin in the prices, often called juice or vig.
Here is a dollar example. Suppose a book takes $110 on each side. It collects $220. It pays the winning bettor $210, including the winning stake, and keeps $10. Real books do not always have balanced action, so this is an illustration of the pricing, not a promise about their profit on every game.
You can divide each side's implied chance by the total to remove that margin in a simple way. Two identical −110 prices would each become 50%. That gives you a rough market estimate. It does not reveal the true chance or prove either side is a good bet.
A winning bet can still be a bad deal
Suppose your own estimate gives a team a 55% chance of winning. This is a made-up estimate for the example, not a forecast for a real team.
At −110, that estimate is above the 52.4% break-even point. At −125, it is below the 55.6% break-even point. You can like the team at one price and pass at the other.
With a $20 stake, the average profit using that 55% estimate would be about $1 at −110, but a loss of 20 cents at −125. You will not receive those averages on a single bet. You either win the stated profit or lose the stake.
The biggest weakness is your estimate. “I think they win” is not the same as “they win often enough to justify this price.” Be careful about claiming an edge from a short hot streak or your favorite team's highlights.
Line shopping only works when the bets match
For negative prices, −110 is better than −125. For positive prices, +150 is better than +140. But check the market before comparing prices.
Over 40.5 receiving yards at −115 is not the same bet as over 45.5 at +100. The cheaper price comes with a harder target. A full-game total is not a first-five-innings total, and a regulation-only hockey result is not the same as a market that includes overtime.
Also check how draws settle. DraftKings' moneyline guide distinguishes two-way and three-way markets. A draw can be a separate selection rather than a refunded stake. Read the rules for the exact market you are buying.
Three questions before you place a bet
- What do I get paid? Separate profit from total return.
- What chance do I need? Compare the price's break-even rate with a realistic estimate.
- Can I get the same bet at a better price? Match the line, period, overtime treatment, and settlement rules.
Keep the stake within a budget you set before the game. A better price improves the deal; it does not make the outcome certain.
After the price check, follow your slip
Once you have placed a bet elsewhere, BetSlip Live can help you follow supported legs and live stats in one view. Import a supported slip from a screenshot, review what was detected, and spend less of the game searching for your numbers.