Over/Under Calculator

Line & Odds

Analysis

Implied Probabilities

Over 2.50.00%
Under 2.50.00%
Total0.00%

No-Vig Probabilities

Over 2.50.00%
Under 2.50.00%

Market Analysis

Vig Percentage0.00%
Expected Value0.00%

How to Use

Enter the Over/Under line and the American odds for both the Over and Under options. The calculator will display the implied probabilities, remove the vig to show true probabilities, and analyze the market for potential value.

Understanding Over/Under Betting

Over/Under betting (also known as totals betting) is one of the most popular bet types in sports wagering. Instead of betting on which team will win, you're betting on whether the combined score of both teams will be over or under a specific number set by the bookmaker.

For example, if the Over/Under line for a basketball game is 220.5, you can bet on whether the total combined score will be over 220.5 points (221 or more) or under 220.5 points (220 or fewer). The half-point is used to prevent a push (tie) outcome.

Finding Value in Over/Under Markets

  • Compare the implied probabilities to your own assessment of likely outcomes
  • Look for markets with low vig percentages for better value
  • Consider factors that might impact scoring (weather, injuries, team strategies)
  • Use historical data to identify patterns in specific matchups or situations
  • Analyze how the public typically bets and look for opportunities to go against the crowd

Inputs

  • Over/Under Line: The total points/goals/runs line set by the bookmaker
  • Over Odds: The American odds offered for the Over bet
  • Under Odds: The American odds offered for the Under bet

Outputs

  • Implied Probabilities: The probabilities represented by the market odds
  • No-Vig Probabilities: The true probabilities with the bookmaker's margin removed
  • Vig Percentage: The bookmaker's margin built into the odds
  • Expected Value: A measure of potential profitability of a bet based on the true probabilities