How does +4.5 spread work? Everything you need to know about betting on point spreads
As an experienced sports bettor, one of the most common questions I get from beginners is: "How does a +4.5 point spread work?" Understanding what the point spread is and how to use it effectively is crucial for anyone getting started in spread betting. In this comprehensive guide, I‘ll teach you everything you need to know to bet, track, and profit from point spreads like a pro.
What is a Point Spread?
A point spread is a handicapping tool used by sportsbooks to even out the odds in a game where one team is heavily favored to win. The spread sets a margin of victory that the favored team has to win by in order for a wager on them to cash. Conversely, the underdog team has to lose by less than the spread or win outright to “cover”. This creates a balanced betting scenario where either team has a reasonable shot to cover the spread.
For example, let’s look at a recent NBA game:
Los Angeles Lakers -5.5
Chicago Bulls +5.5
The Lakers are 5.5 point favorites, indicated by the -5.5 spread. For L.A. to cover, they need to beat the Bulls by 6 or more points. The Bulls are 5.5 point underdogs, shown by the +5.5. Chicago can cover by losing by 5 points or less, or winning the game outright.
This brings us to how to read a +4.5 spread specifically…
How to Read a +4.5 Point Spread
When you see +4.5 beside a team, it means they are 4.5 point underdogs against the spread. Let‘s use a real NFL matchup as an example:
Green Bay Packers +4.5
Dallas Cowboys -4.5
For Green Bay to cover the +4.5 spread as the underdog, they need to:
- Lose the game by 4 points or less
- Win the game outright
If the Packers lose by exactly 4 points, the bet is a Push and original stakes are returned.
For Dallas to cover as 4.5 point favorites, they need to:
- Win the game by 5+ points
Some key takeaways:
- The underdog with +4.5 can lose by up to 4 points and still cover
- The favorite with -4.5 must win by at least 5 points to cover
- If the favorite wins by exactly 4 points, it is a Push
Now let‘s look at some actual NFL results and how the spreads played out…
NFL Spread Scenarios and Outcomes
New England Patriots -3.5
Miami Dolphins +3.5
Final Score: Patriots 28, Dolphins 17
The Patriots won the game by 11 points, covering the -3.5 spread. Bets on New England -3.5 win.
Kansas City Chiefs -6.5
Los Angeles Chargers +6.5
Final Score: Chiefs 24, Chargers 20
The Chiefs won by just 4 points. Since they failed to cover the -6.5 spread, bets on L.A. +6.5 win.
San Francisco 49ers -1.5
Philadelphia Eagles +1.5
Final Score: Eagles 25, 49ers 20
The Eagles won the game outright as 1.5 point underdogs. Bets on Philadelphia +1.5 cover.
Let‘s practice on a few more NFL spreads…
Tampa Bay Buccaneers -7.5
Atlanta Falcons +7.5
Final Score: Buccaneers 28, Falcons 21
Tampa Bay won by 7 points, so this bet is a Push.
Buffalo Bills +2.5
New York Jets -2.5
Final Score: Bills 17, Jets 14
The Bills won outright as 2.5 point underdogs, meaning Buffalo +2.5 covers.
Denver Broncos -3
Oakland Raiders +3
Final Score: Broncos 20, Raiders 17
Denver won by just 3 points. Since they didn‘t surpass the -3 spread, Oakland +3 covers.
Let‘s move on to spreads for other major sports…
Understanding NBA Point Spreads
NBA spreads tend to be much higher on average than NFL spreads due to the high-scoring nature of basketball.
Some typical NBA spreads may look like:
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Los Angeles Lakers -8.5
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Miami Heat +8.5
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Golden State Warriors -11.5
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Houston Rockets +11.5
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Boston Celtics -2
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Chicago Bulls +2
As you can see, with all the 3-point shots and fast pace of the NBA, margins of victory are wider, leading to bigger spreads.
Road underdogs tend to cover NBA spreads more often. Since 2014, NBA road dogs are 49.7% ATS while home faves are 50.3% ATS according to TeamRankings. It‘s a slight edge, but worth factoring into your picks.
How MLB Run Lines Work
In baseball betting, the spread is called the run line. Since lower-scoring games are common in MLB, typical run lines are set at +/- 1.5 runs.
Some examples:
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New York Yankees -1.5
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Boston Red Sox +1.5
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Los Angeles Dodgers -1.5
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San Francisco Giants +1.5
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Houston Astros -1.5
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Texas Rangers +1.5
For run line favorites, they must win by 2+ runs to cover the -1.5 spread. Underdogs can lose by 1 run or win outright to cover the +1.5.
This upset of the favored Yankees by the underdog Orioles is an example of a +1.5 run line cover:
New York Yankees -1.5
Baltimore Orioles +1.5
Final Score: Orioles 5, Yankees 4
Since Baltimore lost by just 1 run as +1.5 dogs, bets on the Orioles cover the run line spread.
Why Betting the Spread is Popular
Spread betting is more popular than moneyline betting for many reasons:
- Provides exciting action on both favorites and underdogs
- Allows you to bet on uneven matchups at reduced risk
- Gives underdogs a “cushion” of points to work with
- Potential for close finishes and extra excitement adds fun
Especially in sports like football and basketball where scores are higher, betting the spread is simply more fun than just picking a winner outright. The point spread creates an even playing field for betting on any game.
How Sportsbooks Set the Spread
There is a science behind how oddsmakers set the opening point spread before a game. Some factors considered include:
- Team power rankings based on stats and records
- Injuries, suspensions, roster changes
- Analytical models that weigh strengths and weaknesses
- Location and home field advantage
- Public perception and betting market signals
- Weather reports
The opening spread aims to get equal betting action on both teams. As more wagers come in, the spread can move to try and rebalance the action.
Understanding Live Betting Odds
Once a game starts, you can also bet on updated live spreads called “in-game wagering”. The spread will adjust over the course of the game to account for what‘s happening on the field.
Some examples:
New Orleans Saints -3.5
Carolina Panthers +3.5
The pregame spread was Saints -3.5. But at halftime, the score is Panthers 21, Saints 10.
The live spread may now be:
Panthers -6.5
Saints +6.5
Since Carolina leads by 11 points, they are now favored and New Orleans is the underdog.
Live betting allows you to capitalize on your analysis of the game as it unfolds. Look for big swings in momentum and scoring margins and how they impact the spreads.
Why You Should Line Shop
It pays to have accounts at multiple sportsbooks so you can shop for the best point spread. Lines often vary between books.
For example, on a game between the Seahawks and 49ers:
Book 1: Seahawks -6.5, 49ers +6.5
Book 2: Seahawks -7, 49ers +7
Book 3: Seahawks -6, 49ers +6
Placing your bet at Book 3 where the Seahawks are -6 rather than -7 gives you an extra point of cushion. This additional point could make the difference between a win and a loss.
Even half points can be crucial. Always get the best number!
Buying Points to Improve Spread Bets
Most sportsbooks let you buy extra points on the spread to increase your chances of covering. The cost is higher risk for lower potential winnings.
Let‘s say the line is:
Dallas Cowboys -7.5 (-110)
You could buy it down to:
Dallas Cowboys -3.5 (-150)
While the payout if Dallas covers is now lower, you have a bigger cushion of 4 points rather than 7.5 points. This could make sense in certain situations.
Betting Against the Public
When most of the bets are coming in heavy on one team, that overwhelming consensus is called “the public”. Oftentimes, it pays to go contrarian and bet against the public.
Books will adjust the spread trying to attract action to the other side to balance their risk. But you can find value on unpopular teams with public biases over-inflating the favorite‘s line.
How to Track and Analyze Your Spread Bets
Serious sports bettors treat wagering like investing. Keep detailed records of your spread bets and analyze the data for insights.
Tracking key stats like your ROI, win rate, average bet, and risk/reward ratios is essential. Break down your record by sport, by team, by spread ranges, and other filters.
This allows you to critique your process, find leaks, and capitalize on strengths. The data will reveal which teams, spreads, bet sizes, and strategies are optimal for you.
Common Mistakes Beginners Make
Some typical beginner mistakes to avoid when spread betting:
- Betting too many big favorites and laying a lot of points
- Ignoring injuries and roster changes that move the spread
- Blindly betting heavy favorites on the moneyline
- Failing to shop for the best line
- Making too many spread bets each day without selectivity
Stick to selective bets on games you have a clear edge in. Don‘t force bets out of boredom. Patience pays off.
Factor Spreads Into Parlay Bets
Point spreads are a key part of parlays. A parlay combines two or more spread bets on a single ticket for bigger potential payouts. However, all legs must hit to cash a parlay.
Some tips for parlays with spread bets:
- Stick to short 2 or 3 team parlays to increase chances of winning
- Consider buying extra points on spreads to build in margin for error
- Pair obvious favorites on moneylines with close spread bets
- Avoid huge underdogs likely to bust parlays
With the combined risk, make sure every parlay bet has overlay value.
Home Field Advantage Matters
While not an absolute rule, home underdogs tend to cover spreads more often than road favorites across most major sports.
Since 2003, NFL home dogs cover 51.1% ATS while road faves are 48.9% ATS according to Bet Labs Sports.
In the NBA, road pups cover 49.7% compared to 50.3% for home faves.
Don‘t automatically bet big road chalk without considering the home field edge built into the spread.
NCAA Football vs. NFL Spreads
College football tends to have more variance and uncertainty than the NFL. This leads to some key differences in typical spreads:
NCAAF Spreads
- More teams receive 3 points or fewer compared to NFL
- Elite teams often lay -35 points or more compared to NFL
- Wider range of talent levels leads to blowouts and covers
- Surprising upsets more common with amateurs
NFL Spreads
- Majority of spreads between -3 to -7 points
- Less than 10 point favorites most weeks
- Wider parity means fewer blowout covers
- Much harder for bad teams to pull outright upsets
Study how spreads are distributed for each league. Analyze historical trends by conference and divisions as well. The data reveals valuable betting opportunities.
Final Tips for Spread Betting Success
Here are some final tips to recap how to master point spread betting:
- Shop for the best spreads and buy points when needed
- Study the factors oddsmakers use to set the opening lines
- Learn to quickly calculate spreads and payouts in your head
- Follow line movement closely for insights into shifting odds
- Keep detailed records and analyze your bet history consistently
- Fade public sentiment and be willing to bet unpopular teams
- Only bet games you have a strong edge in based on matchups, data, systems, or research
While point spreads may seem complex at first, with study and practice you will be reading and reacting to lines seamlessly. Never stop learning and improving your betting craft.
Understanding how point spreads work is an essential skill for any sports bettor. I hope this detailed guide gives you the confidence to start betting and profiting from spreads across all major sports. If you have any other spread betting questions, feel free to reach out anytime. Enjoy the games!
