In North American sports betting many of these wagers would be classified as over-under (or, more commonly today, total) bets rather than spread bets. However, these are for one side or another of a total only, and do not increase the amount won or lost as the actual moves away from the bookmaker's prediction. Instead, over-under or total bets are handled much like point-spread bets on a team, with the usual 10/11 (4.55%) commission applied. Many Nevada sports books allow these bets in parlays, just like team point spread bets. This makes it possible to bet, for instance, team A and the over, and be paid if both team A "covers" the point spread and the total score is higher than the book's prediction. (Such parlays usually pay off at odds of 13:5 with no commission charge, just as a standard two-team parlay would.)
For those that live outside the United States, this may look even more strange since -110 is in American odds format. In Decimal odds, which is common in Europe, -110 translates to 1.91 odds. I'm not going to dive into Decimal odds (or other formats) since this article is about American odds, but the Decimal system is pretty straightforward. The odds listed represent a bettor's total return for a winning wager as you simply multiply the odds by the amount you wish to risk. If someone risks $100 at 1.91 odds and win, they receive $91 plus their initial $100 risked ($91 + $100 = $191).

There are also half bets, which are a wager placed on the odds posted for the first half or second half of a football game only.  All halftime wagers are calculated the same as a straight wager.  Another type of bet is a parlay which is a selection of 2 or more teams.  All teams wagered on in a parlay must win. If there is a tie on any bet you would be paid out on the next payoff.  For example, if you had a 5 team parlay and two teams tied, you would then be paid on a three team parlay if all the other teams won.  Another type of football bet is called a teaser, which is a selection of two or more teams in one wager in which the point spread is adjusted in your favor. The number of football teams selected and the number of points selected determines the odds for payout.
The easiest way to see how your favorite team has been going against the closing point spread line is to visit The Football Lines .com's NFL Spread Results pages, here you will find the results for all 32 pro football teams against the closing NFL spread listed by AFC teams and NFC teams. These results are also archived by the week and include the most current games right back to the 2007 NFL season. With green representing a win against the closing spread, yellow a push and red a loss our NFL Spreads Results are an easy way to identify teams who are on a winning or losing streak, how different teams have performed against the spread after a bye week or how different teams have gone over the years in various NFL weeks.

Point Spread: The point spread remains the favorite way to wager on pro football, regardless of how many new forms of wagering come on stream. It’s called the line or spread and it’s known as betting ‘sides.’ The common misconception is that Las Vegas sets the spread as its best guess at the margin of victory. But really, it's a number they feel that is a perfect balance and will see an equal number of people to bet the underdog as on the favorite. A negative value like -6.5 means that team is favored by 6.5 points. So deduct 6.5 points from their total score. A positive value on the same game would be +6.5 (add 6.5 points to their final score) and would make that team an underdog of 6.5 points. The favorite must win by at least seven points to cover the spread. The underdog can lose by six points and still cover.