Breakeven Calculator
The win rate you need at any price just to stay level
Where 52.38% comes from
At -110 you risk $110 to win $100. Win once and lose once and you're down $10 — you went 1-1 and still lost money. That $10 is the sportsbook's margin, and it's why breaking even requires winning more than half.
The math: -110 converts to 1.909 in decimal odds. Divide 1 by 1.909 and you get 0.5238 — 52.38%. Over 100 bets at -110, going 52-48 still leaves you slightly behind. You need 53 wins to be clearly ahead.
Do it yourself: convert the odds to decimal, then divide 1 by that number.
Negative odds → (100 ÷ the number) + 1. Positive odds → (the number ÷ 100) + 1.
The number at every common price
| Odds | Breakeven win rate | Record needed per 100 |
|---|---|---|
| -200 | 66.67% | 67-33 |
| -150 | 60.00% | 60-40 |
| -120 | 54.55% | 55-45 |
| -110 | 52.38% | 53-47 |
| +100 | 50.00% | 50-50 |
| +150 | 40.00% | 40-60 |
| +200 | 33.33% | 34-66 |
| +500 | 16.67% | 17-83 |
What this changes about how you bet
Two things.
1. It reframes what a "good record" means
A 55% win rate at -110 sounds modest and is, in fact, excellent — that's roughly a 5% return on turnover, which very few bettors sustain. Meanwhile someone bragging about a 60% record on heavy favorites at -200 is losing money. Record without prices attached tells you nothing.
2. It shows you exactly what line shopping is worth
Moving from -115 to -110 lowers your breakeven from 53.49% to 52.38%. That's 1.11 percentage points of edge, free, for opening a second app. Over a season of a few hundred bets, that difference is often larger than whatever handicapping edge you think you have.
This is the strongest argument for holding accounts at multiple books. You aren't hunting for a miracle number — you're shaving the breakeven down a point at a time.
Using it on longshots
The calculator is just as useful going the other way. A +500 underdog only needs to win 16.67% of the time to break even — about one in six. If you think a spot is genuinely closer to one in four, that's a large edge, even though you'll lose the bet most of the time.
Longshots feel bad because they lose often. The breakeven number is how you tell the difference between a bet that loses often and a bet that's bad.
Common questions
What is a breakeven win rate?
It's the percentage of bets you need to win at a given price simply to end up level — no profit, no loss. It equals the implied probability of the odds. At -110 it's 52.38%; at +100 it's 50%.
Why do I need to win more than 50% at -110?
Because you risk $110 to win $100. The extra $10 is the sportsbook's margin, or vig. Going 1-1 leaves you down $10, so breaking even requires winning slightly more often than you lose.
Is breakeven win rate the same as implied probability?
Mathematically, yes — they're the same number. The difference is framing. Implied probability describes what the price says about the outcome's likelihood. Breakeven win rate describes what you need to achieve to avoid losing money at that price.
What win rate do professional bettors actually hit?
Sustained win rates of 54–56% against standard -110 spread and total prices are considered strong long-term results. Anything advertised well above that over a large sample should be treated with skepticism.
How much does line shopping improve my breakeven?
Getting -110 instead of -115 lowers your breakeven from 53.49% to 52.38% — 1.11 percentage points. Across hundreds of bets, that improvement often exceeds a bettor's actual handicapping edge.
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