Teaser Calculator
Bettor Ed’s Teaser Calculator is a free betting teaser calculator that helps you price teasers more accurately. Choose the sport, number of points to tease, teaser odds, sportsbook, and the game you want to tease. The calculator then estimates the probability that each teased spread or total wins and shows whether the teaser is +EV.
How to Calculate Teaser Odds
How teaser bets work
A teaser is essentially a parlay of alternative lines.
If the main spread for a team is -4.5, a 4-point teaser would move it to -0.5. If the main total is 221.5, a 4-point teaser would move the Over to 217.5 or the Under to 225.5. Those are alternative lines, specifically, those with a higher win probability than the original line. A teaser combines two or more of those into a parlay.
The question we want to answer is whether the teased line is worth the lower payout the sportsbook is offering.
How the teaser calculator works
This calculator takes the current market lines and teaser points to estimate the probability that each teaser leg wins. It compares that win probability to the teaser odds to give you the EV of a bet on that teaser.
A teaser calculator really just takes the math one step further than pricing alternative lines. We'll talk about the math a little bit below, but for an even more in-depth explanation on alternative line pricing and to experiment with half point odds, read the Half Point Calculator page, the Secrets of Sports Betting book, and take the Sports Betting for Serious Bettors course.
Why teaser points aren't always worth the same amount
It's important to note that teasing a spread from -2.5 to +1.5 isn't necessarily worth the same as moving a team from -8.5 to -4.5, even though they're both 4-point moves. The value depends on key numbers in that sport and how much each number is "worth". The same is true for totals.
Why spreads and totals affect teaser pricing
Spreads and totals are connected. High-scoring games tend to have more variance, meaning the range of possible outcomes is wider. Large or small spreads might also contribute to a higher or lower total. So, the value of moving a spread can change depending on the total, and vice versa.
That's why the calculator uses real games. The value of teased points depends on the game context.
Why teaser math differs by sport
You can't price teasers the same way for every sport. Basketball scoring tends to follow one distribution with its own parameters, MLB another, NHL another, and so on. Each sport is different and each have their own set of key numbers which change the distribution.
What this calculator tells you
The teaser calculator tells you whether your teaser is worth the price you're getting. It can tell you whether the teaser is +EV, -EV, or about neutral across different teased lines with different spreads and totals.
Like all betting models, this one is based on averages and assumptions. The good news for bettors is that the sportsbooks have a pricing model as well, which is just as fallible. If a particular game, team, or market is going to be much different than average, the usual teaser pricing may not apply. That's where you can find mispricing and +EV opportunities.
Teaser Calculator FAQ
What is a teaser calculator?
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A teaser calculator is a betting tool that estimates the win probability and EV of teaser bets. It adjusts the spread or total for each leg and compares win probability to teaser odds.
What does this teaser calculator do?
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Bettor Ed’s teaser calculator helps you evaluate NBA and college basketball teasers. You select the sport, teaser size, teaser odds, sportsbook, and the game line you want to tease. The calculator tells you how often each leg should win and whether the bet is +EV.
How do you calculate a teaser bet?
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A teaser bet is calculated by determining the win probability of each leg and multiplying them together.
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Said another way, a teaser is like a parlay of alternative lines.
Is a teaser really just a parlay of alternative lines?
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Yes, that's an easy way to think about it.
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A teaser is a parlay where each leg gets moved in your favor by a certain number of points. Moving the legs by a certain number of points means it's an alternative line. In a teaser, the points always move in your favor, meaning the individual legs are more likely to win. The tradeoff that the teaser price may not be worth the increased win probability.
Do totals matter when teasing spreads?
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Yes, spreads and totals are connected.
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Higher scoring games tend to have more variance, and that can change how valuable each point is. Large or small spreads might also contribute to a higher or lower total. So, the total can affect the value of a teased spread, and vice versa.
Why does teaser price matter so much?
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Because better lines don't automatically mean better bets.
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If the true probability of your teaser winning is better than the odds you're getting, the bet is profitable in the long run. If it's below that threshold, the teaser is -EV even though the adjusted lines look better.
Are teasers good bets?
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Like any other bet, some are, but most aren't.
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A bet is only "good" if the probability of winning is better than the odds you're getting.
Are these teaser calculations accurate?
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They're useful estimates, but they're still just model outputs. Like any betting model, the results are based on averages and assumptions.
Why does teaser pricing differ by sport?
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Because scoring distributions differ by sport. Basketball scoring tends to follow one distribution with its own parameters, MLB another, NHL another, and so on. Each sport is different and each have their own set of key numbers which change the distribution.
How should I use a teaser calculator?
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Use a teaser calculator as a pricing tool. It gives you a ballpark win probability and expected value, which is a good starting point. Once you have that baseline, consider other factors. Higher-variance games usually make teasers worse, while lower-variance games usually make them better. Think about whether the line is likely to move after you bet it. Also compare your sportsbook’s line to the rest of the market. If you’re teasing -7 at one book while most books are -7.5, that’s extra value for free. If you're teasing -7.5 while everyone else says -7, you're losing that half point.
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