Over/Under Totals Calculator
Instantly work out your payout on over/under totals bets for any sport. Enter the line, your chosen side, odds, and stake to see your potential return.
About this calculator
Over/under betting (also called totals betting) asks you to predict whether the combined score of both teams will finish above or below a line set by the bookmaker. If you back the Over and the total score exceeds the line, you win; back the Under and it must come in below. The return formula is straightforward: if betChoice = 'over', return = betAmount × overOdds; if betChoice = 'under', return = betAmount × underOdds. Because this is a two-sided market, the bookmaker's margin is embedded in the gap between the implied probabilities of the over and under odds. Implied probability = 1 / decimalOdds. If the two implied probabilities sum to more than 1.0, the excess is the bookmaker's vig (overround). A score that lands exactly on the total line — called a push — results in a full refund, though this is more common in American football than soccer.
How to use
Imagine an NFL game with a total line of 47.5 points. You believe it will be a high-scoring game and bet $200 on the Over at odds of 1.91. Step 1 — identify bet choice: Over. Step 2 — apply the formula: return = betAmount × overOdds = $200 × 1.91 = $382. Step 3 — calculate net profit: $382 − $200 = $182. The final combined score is 52 points, which exceeds 47.5, so your bet wins and you collect $382. Had you backed the Under at odds of 1.95 with the same $200 stake, your return would have been $200 × 1.95 = $390, but the bet would have lost.
Frequently asked questions
How is the over/under total line set by bookmakers?
Bookmakers use a combination of statistical models, historical scoring averages, team form, weather conditions, and injury reports to set the opening total line. The line is then adjusted in response to betting volume to keep action balanced on both sides. In practice, the initial line closely reflects the bookmaker's true expectation of total scoring, and sharp bettors who spot mispriced lines can move the number before the general public bets heavily.
What does it mean when the final score lands exactly on the over/under line?
When the combined score equals the total line exactly — for example, a combined score of 47 on a line of 47 — the bet is graded as a push and all stakes are refunded in full. To avoid pushes, bookmakers often set lines at half-point values (e.g. 47.5), since half-points cannot be matched by a whole-number score. If a bookmaker does offer a whole-number line and a push occurs, no profit or loss is recorded for either side.
Why do over and under odds sometimes differ for the same total line?
When more money flows to one side, bookmakers shade the odds — slightly reducing the payout on the popular side and improving it on the other to attract balanced action. This means the Over might be priced at 1.87 while the Under sits at 1.95 on the same line. Beyond balancing books, odds differences also reflect the bookmaker's opinion that one outcome is marginally more likely, especially when late injury news or weather forecasts shift the expected scoring environment.