Point spread betting is the most popular way to wager on team sports in the United States. If you've seen a line like "Chiefs -6.5" and wondered what it means, this guide covers how point spread bets work, why sportsbooks use them, and what to look for before placing your next bet.
What Is a Point Spread Bet?
A point spread is a margin of victory set by a sportsbook to level the playing field between two unevenly matched teams. Instead of simply picking which team wins, you're betting on whether a team wins or loses by a specific number of points.
The favorite is assigned a negative number and must win by more than that margin for the bet to cash. The underdog gets a positive number and can lose by up to that amount, or win outright, and still cover.
Here's a simple example:
Kansas City Chiefs -6.5 vs. Las Vegas Raiders +6.5
- If you bet the Chiefs -6.5, Kansas City needs to win by 7 or more points.
- If you bet the Raiders +6.5, Las Vegas needs to lose by 6 or fewer points, or win the game outright.
If the Chiefs win 27-20, that's a 7-point victory. Chiefs -6.5 covers. Raiders bettors lose.
Why Sportsbooks Use Point Spreads
Sportsbooks are not in the business of predicting outcomes. They are in the business of balancing risk. A spread is a tool to attract equal action on both sides of a game. When betting is balanced, the sportsbook profits from the juice, which is the commission built into the odds regardless of the result.
Without a spread, nearly everyone would bet the heavy favorite in a lopsided matchup, leaving the sportsbook dangerously exposed. The spread gives bettors a reason to take the underdog, creating a more balanced market.
This is also why lines move. If too much money comes in on one side, the sportsbook adjusts the spread to incentivize action on the other side. You can track sharp line movement in real time using Line Whale's Steam Moves tool.
How Point Spread Odds Are Priced
Most spread bets are priced at -110 on both sides. That means you bet $110 to win $100 in profit. The extra amount you pay beyond an even-money return is the juice, or vig, the sportsbook's built-in margin.
Occasionally you'll see spreads priced differently, such as -115 on one side and -105 on the other. This reflects where the money is leaning. Shopping for the best line across multiple sportsbooks can meaningfully improve your returns over time. Even half a point or a few cents of juice difference adds up across hundreds of bets.
Spreads vs. Moneylines: What's the Difference?
A moneyline bet is a straight-up wager on who wins the game, with no margin required. A spread bet requires the favorite to win by enough, or the underdog to stay within range.
If you like the Chiefs to dominate a weak opponent, the spread may offer better value than the moneyline because the payout is standardized near -110 instead of a steep price like -350 or -400. Conversely, if you think a big underdog can keep things close or pull off the upset, the spread at +6.5 for -110 might be less appealing than the moneyline at +240.
Neither option is universally better. It depends on your read of the game and where you find value.
Reading the Spread: A Real-World Example
Here is an NBA example:
Boston Celtics -8 (-110) vs. Detroit Pistons +8 (-110)
You believe Boston wins comfortably, but you're not sure by how much. You take Celtics -8. Here's how three outcomes play out:
- Celtics win 112-102 (10-point win): You win. Boston covered the -8 spread.
- Celtics win 108-102 (6-point win): You lose. The Celtics won, but did not cover.
- Celtics win 110-102 (8-point win exactly): This is a push. Your bet is refunded.
Landing exactly on the spread number is called a push. It's why many sportsbooks use half-point spreads like -7.5 or -8.5, which eliminate the possibility of a push altogether.
You can compare live NBA spreads across sportsbooks on Line Whale's NBA odds page to make sure you're getting the best number before you bet.
What Makes a Good Spread Bet?
Casual bettors ask "who's going to win?" Sharp bettors ask "is the spread set correctly?" Those are different questions, and the second one is what drives long-term profitability.
A spread bet carries positive expected value when you believe the true margin of victory differs from the spread by more than the juice requires you to overcome. That starts with doing your own research rather than following the public.
A few things to evaluate when handicapping a spread:
Line Movement
If a spread opens at -3 and moves to -5 before kickoff, something drove that shift. Either public money pushed it, or sharp bettors hit one side hard. Lines moving against the public betting percentage often signal sharp action worth noting.
Key Numbers
In football, common margins of victory cluster around 3, 7, and 10 because of how scoring works. A spread of -3 or +7 carries more weight than -4 or +9. Getting on the right side of a key number matters.
Context and Motivation
Playoff implications, home-field advantage, travel schedules, injury reports, and rest days all affect outcomes. Spreads reflect consensus information, but they don't always account for situational factors accurately.
If you want to assess whether a bet is worth making at a given price, Line Whale's EV Calculator can help you estimate expected value based on your own probability assessment.
Key Takeaways
- A point spread sets a required margin of victory for the favorite and gives the underdog a head start.
- Sportsbooks use spreads to balance action on both sides of a game, not to predict winners.
- Standard spread bets are priced at -110, meaning you pay juice on top of your wager.
- A push occurs when the final margin equals the spread exactly, and your bet is refunded.
- Shopping for the best line across sportsbooks is one of the simplest ways to improve your results.
- Sharp bettors focus on whether the spread is set correctly, not just who they think will win.
Point spread betting rewards preparation. The more you understand how lines are set, why they move, and where value hides, the better equipped you'll be to make smarter decisions on every wager.