Over/under bets, also referred to as totals, involve wagering on the combined number of points, runs, or goals scored in a game. The sportsbook sets a line, and bettors decide if the final total will be over (more than the set line) or under (less than the set line). This type of bet is very popular across major sports including the NFL, NBA, MLB, and NHL, as it allows fans to engage in the game without picking a winner.
Oddsmakers determine the total by forecasting the combined score of both teams, considering factors like offensive and defensive strengths, pace of play, and recent team performance. If the total points scored exceed the line, those who bet the “over” win, and if it falls below, the “under” bettors cash in. Overtime counts toward the total unless otherwise stated, and if the final score matches the set number exactly, the bet is a push, and stakes are returned.
Here’s how to place an over/under bet:
- Open your sportsbook app and pick your game by selecting a sport or league.
- Choose the total (over/under) market, often labeled as “Total,” “O/U,” or “Over/Less,” with a number like 47.5 and associated odds.
- Select whether you want to bet over or under that number.
- Enter your stake and confirm your bet slip with the calculated payout.
- Place the bet and track it under “Open Bet.”
For example, if the total is set at 47.5 points with -110 odds, betting on the “over” means you need 48 or more points to win. A $100 bet would yield $190.91 (your original $100 plus $90.91 profit) if successful. You can also bet totals live during games, with odds adjusting based on the pace and score.
Oddsmakers set these lines by analyzing various data points such as team performance, player injuries, playing conditions, and betting trends. Each sport has unique aspects influencing totals—for NFL and college football, it’s weather and quarterback play; in basketball, it’s pace and shooting efficiency; in baseball, pitcher matchups; in hockey, goalie performance; and in soccer, styles and fatigue.
Popular sportsbooks for over/under betting include DraftKings and FanDuel, known for their expansive live betting options and alternative line menus. Lines can change due to new information such as injuries, weather, public betting patterns, or significant bets from expert bettors. For example, an NBA game’s total might start at 228.5 but drop if a key player is injured before the game starts.
To understand profits, vig (or vigorish) is the bookmaker’s built-in commission, often reflected in the standard -110 odds on both sides. This implies the sportsbook holds around a 4.76% commission on bets. Probabilities are derived from the odds, exceeding 100% when combined, with the difference showing the bookmaker’s edge.
Gambling disclaimer: Only those over 21 may gamble. If you have gambling problems, seek help at 1-800-Gambler. Gambling legality varies by state, so always play responsibly.
Fan Take: For basketball enthusiasts, understanding over/under bets adds a thrilling dimension to watching games beyond just rooting for a winner. It can heighten engagement and strategy, potentially growing the sport’s fanbase as more people explore different ways to connect with basketball action.

