What Is a Moneyline Bet? Definition + How American Odds Work
A moneyline bet is a wager on which team or athlete will win a game outright, with no point spread. The price is shown in American odds: a negative number indicates the favorite (how much you must risk to win $100), and a positive number indicates the underdog (how much you win on a $100 stake). It’s the simplest sports bet — pick the winner.
How a Moneyline Works
American odds use $100 as the reference unit, but you can stake any amount.
Favorite example: Yankees -150
- Risk $150 to win $100 profit.
- A $50 bet wins $33.33 profit (50 × 100/150).
- Total return on a winning $50 bet = $83.33 (stake + profit).
Underdog example: Red Sox +200
- Risk $100 to win $200 profit.
- A $50 bet wins $100 profit (50 × 200/100).
- Total return on a winning $50 bet = $150.
Even-money: Both teams +100 (or -100)
- Risk $100 to win $100 profit. True 50/50 price (no vig).
Implied probability conversion:
- Negative odds (favorites): odds / (odds + 100) → -150 = 150/250 = 60.00%
- Positive odds (underdogs): 100 / (odds + 100) → +200 = 100/300 = 33.33%
Note: -150 and +200 don’t sum to 100% — that’s the vig. No-vig probabilities (after normalization) would be roughly 58% and 42%.
Moneyline vs. Point Spread
| Feature | Moneyline | Point Spread |
| What you pick | Straight-up winner | Winner against handicap |
| Heavy favorite price | Expensive (e.g., -350) | Closer to even (-110) |
| Best for | Underdogs, low-scoring sports | Favorites, high-scoring sports |
| Push possible? | Rare (only on draws) | Yes |
For a 14-point NFL favorite, a moneyline might be -700 — risk $700 to win $100. Most bettors take the spread instead. For a coin-flip MLB or NHL game, the moneyline is the default play.
How to Use Moneyline Bets
- Live underdogs: When you think a +180 underdog has a true 45% chance to win, that’s +EV. (45% true probability vs. 35.7% implied at +180.)
- Low-scoring sports: MLB, NHL, and soccer are typically bet on the moneyline because point spreads are rare or low-scoring.
- Parlay legs: Moneylines are popular parlay building blocks because the math is simple.
- Avoid heavy favorites: -400 or worse offers terrible risk/reward unless you have a strong model edge.
PropsBot’s High ROI Signal generated +60,778 units profit across all sports by attacking soft moneyline and prop pricing. Models that beat market calibration (PropsBot MLB Brier 0.1903 vs. Vegas 0.1947) consistently find moneyline value the market misses.
Common Mistakes and Misconceptions
- “Negative odds mean a sure thing.” No. -150 still means the favorite loses 40% of the time.
- “+200 means I get $200 back.” You get $200 in profit plus your $100 stake back — $300 total return.
- “Moneylines are always worse than spreads.” Wrong. For underdogs and coin-flip games, moneylines often offer better value.
- Confusing American with decimal odds: +200 American = 3.00 decimal = 2/1 fractional. All express the same payout.
FAQ
What does +200 moneyline mean?
A $100 bet wins $200 in profit if the team wins outright. Total return is $300 (stake + profit).
What does -150 moneyline mean?
You must risk $150 to win $100 in profit. The team is favored.
How do I calculate moneyline payout?
For positive odds: stake × (odds/100). For negative odds: stake × (100/|odds|).
When should I bet the moneyline vs. spread?
Bet ML when you like the outright winner, especially with underdogs. Bet the spread when the favorite is heavy and you want a fair price.
Can a moneyline bet push?
Only if the game ends in a draw (rare in MLB/NBA/NFL). Most US books refund pushes; some price a “Tie” as a third option in soccer.
Internal Links
- /glossary/parlay/ — Combine moneyline bets into parlays
- /glossary/no-vig/ — Strip the vig from moneyline pricing
- /tools/no-vig-fair-odds-calculator/ — Convert moneyline odds to true probability
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Convert the odds: Turn any moneyline price into decimal, fractional, or implied probability with our free odds converter.
