Point-Spread Calculator
Enter the final score and the spread for the team you are grading.
Spread resultCover by 0.5 points24 − 21 − 2.5 = +0.5 adjusted margin
Use a negative number for a favorite and a positive number for an underdog.
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Check a point spread, convert American odds into implied probability, grade an over/under, or measure units and ROI. Every calculator is free and works instantly—no signup required.
Moneyline Probability Converter
Convert American moneyline odds into the sportsbook’s implied probability before vig removal.
Implied probability60.00%$66.67 profit and $166.67 total return on a $100 stake
Implied probability includes the sportsbook margin. It is not the same as a model’s estimated win probability.
Over/Under Calculator
Add the final scores and compare the combined points with the posted total.
Total resultOver by 0.5 points27 + 20 = 47 combined points
If the combined score equals a whole-number total, the result is a push.
Betting Units & ROI Calculator
Measure net results consistently, regardless of the dollar size of each wager.
Performance+1.25 units · 12.50% ROI$125.00 net profit on $1,000.00 wagered
Enter losses as a negative number. ROI equals net profit divided by the total amount wagered.
How to read the results
Point spreads
Add the selected team’s spread to its scoring margin. A positive adjusted margin is a cover, zero is a push, and a negative result is a loss against the spread.
team score − opponent score + spread
Moneyline odds
Negative odds show how much must be risked to win $100. Positive odds show the profit on a $100 stake. The converter expresses either format as implied probability.
Totals
Add both teams’ scores and compare the result with the closing over/under line. A half-point line cannot push.