Sportsbooks also offer wagering on the total or Over/Under – the cumulative number of points scored by both teams in a game. You can bet on if the final score will go either Over or Under that set total. For example, in a game pitting Team A vs. Team B, the total is 48. A wager on Over wins if the total points scored exceeds 48, and a wager on Under wins if the total points scored falls below 48. If the total lands on 48, it’s a push and wagers are refunded.
Sometimes with NFL odds you’ll see a spread posted as a whole number. Decimals or fractions are usually utilized to ensure there won’t be a tie. If in our example the spread was reset to 10 with the Colts favored and they win by 10, then the game is considered to be a tie, which in betting terms is called a push. If there is a push all bets are off and the sportsbooks return all wagers back to the bettors.
Using the Patriots-Rams Super Bowl matchup as our example, the Patriots are listed by most sportsbooks as a 2.5-point favorite. The Patriots are listed at -2.5, while the Rams are listed at +2.5. If you bet on the Patriots to cover the spread and they win by three points or more, you win. If you bet on the Rams to cover the spread and they lost by less than three points or win the game, you win.
Here's an example: Imagine that using the money line above with the White Sox and the Astros, you want to win about $100. If you place your bet on the favored White Sox, you will pay the bookie $120. If you win, you get your $120 back, plus $100 in winnings. If you lose, the bookie keeps your $120 (technically, bookies collect on losing bets after the game most of the time, but for our example we'll assume the bet is prepaid). If you bet $100 on the Astros, you'll get $110 in winnings if they win, and only lose $100 if they lose.
Now for American Style Sports Odds. Typically, when you are betting on the point spread, as in topic #1 above, the odds are displayed or implied to be (-110), which is known as American Style odds. The American Style odds format is based on $100. When the number, is displayed as a negative number (-110), it indicates how much money you must risk to realize a profit of $100. In our scenario, you must wager $110 to win $100 profit. If you do, you will receive $210 when you cash in…the winning amount PLUS your initial wager amount.

Total: Also called the over/under, it is a number set by the sportsbooks that proposes a number of points that will be scored in the game by both teams combined. Then, fans predict whether there will be more points or less points than the ‘total.’ If you bet the under 41.5, you are hoping for a tough defensive battle with lots of running game. Pick the over, and presumably you feel this will be a high-scoring game. In short, you are predicting whether the combined total score will be more than (over) or less than (under) the total.
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