The over/under is a single number representing the total points both teams will combine to score — you bet whether the actual total will go over or under it.
Every game has two main markets: who wins, and how many points get scored. The over/under lives in the second bucket. The sportsbook sets a number — 224.5 in an NBA game, 8.5 in a baseball game, 47 in a football game — and you pick a side. The half-points work the same way as spreads: they prevent ties. If the book set the total at 225 even and the game landed on exactly 225, everyone gets their money back. The .5 forces a decision. Totals are priced at the same standard -110 juice as spreads. You're not betting on who wins — you're betting on the combined pace and scoring of the entire game.
Example
A Chiefs vs Bills game has an over/under of 48.5. You bet the under at -110. The final score is 24-20 — 44 points total. You win.
What it means for your decision
Totals reward understanding pace, shooting, pitching, or weather — whatever drives scoring in the sport you're watching. The line reflects the market's expectation for how the game will flow. If an injury or matchup tilts that flow in one direction and the number hasn't fully adjusted, that's where the opportunity sits. Your decision is always yours.
Frequently asked
Who sets the over/under?
The sportsbook sets an opening number based on models and team stats. The number moves as bets come in and as news breaks about weather, lineups, or pace.
Does overtime count toward the total?
Yes in most sports — the full official score including overtime or extra innings counts for totals.
Why do totals move before tip-off?
Same reasons spreads move — injuries, weather, lineup changes, and sharp money. A total dropping by 2 or 3 points usually signals real information entered the market.
What's a 'first-half total'?
A separate total just for the first half (or first five innings in baseball). It lets you bet the pace of the opening period without waiting for the full game.
Related terms
In the glossary