Calculate the win percentage needed to break even at any odds
Common odds and their break even win percentages
| American Odds | Decimal | Break Even % | At 55% Win Rate |
|---|---|---|---|
| -200 | 1.50 | 66.67% | -11.67% edge |
| -150 | 1.67 | 60.00% | -5.00% edge |
| -130 | 1.77 | 56.52% | -1.52% edge |
| -110 | 1.91 | 52.38% | +2.62% edge |
| +100 | 2.00 | 50.00% | +5.00% edge |
| +110 | 2.10 | 47.62% | +7.38% edge |
| +150 | 2.50 | 40.00% | +15.00% edge |
| +200 | 3.00 | 33.33% | +21.67% edge |
Break Even % = 1 / Decimal Odds × 100
For American odds: If negative, BE% = |Odds| / (|Odds| + 100)
If positive, BE% = 100 / (Odds + 100)
At standard -110 odds, you need to win 52.38% of your bets just to break even. The 2.38% above 50% is the sportsbook's edge (the vig). To be profitable, you must find bets where your true win probability exceeds the break even percentage.
At -110/-110 on both sides, sportsbooks have a 4.55% edge on every bet. Over 1,000 bets, someone betting randomly would be expected to lose about $45 per $100 bet due to the vig alone.