Odds converter
American, decimal, fractional and implied probability — instantly.
American
-110
Decimal
1.91
Fractional
10/11
Implied win %
52.38%
Choose the format you’re entering, then read the rest. Implied win % includes the book’s margin (the vig).
American, decimal, fractional — what’s the difference?
American odds use + and − (e.g. +150 means $150 profit on a $100 bet; −110 means you risk $110 to win $100). Decimal odds (common in Canada and Europe) show your total return per $1 staked (1.91). Fractional odds (UK) show profit relative to stake (10/11).
The implied probability is the win rate the odds bake in — including the book’s margin (the “vig”). Comparing that implied probability to your own estimate is the heart of finding value. Bankroll Guardian de-vigs and tracks this automatically for every bet you log.
Betting odds chart: American, decimal & fractional
Every common price in all three formats, with the implied win probability and the profit on a $100 bet. Minus prices (−110, −200) are favorites; plus prices (+150, +250) are underdogs; +100 is even money (some books write it as −100).
| American | Decimal | Fractional | Implied win % | Profit on $100 |
|---|---|---|---|---|
| -1200 | 1.08 | 1/12 | 92% | $8.33 |
| -500 | 1.20 | 1/5 | 83% | $20 |
| -400 | 1.25 | 1/4 | 80% | $25 |
| -300 | 1.33 | 1/3 | 75% | $33.33 |
| -200 | 1.50 | 1/2 | 67% | $50 |
| -175 | 1.57 | 4/7 | 64% | $57.14 |
| -140 | 1.71 | 5/7 | 58% | $71.43 |
| -138 | 1.73 | 8/11 | 58% | $72.73 |
| -125 | 1.80 | 4/5 | 56% | $80 |
| -120 | 1.83 | 5/6 | 55% | $83.33 |
| -110Standard vig | 1.91 | 10/11 | 52% | $90.91 |
| +100Even money | 2.00 | 1/1 | 50% | $100 |
| +110 | 2.10 | 11/10 | 48% | $110 |
| +125 | 2.25 | 5/4 | 44% | $125 |
| +150 | 2.50 | 3/2 | 40% | $150 |
| +175 | 2.75 | 7/4 | 36% | $175 |
| +200 | 3.00 | 2/1 | 33% | $200 |
| +250 | 3.50 | 5/2 | 29% | $250 |
| +260 | 3.60 | 13/5 | 28% | $260 |
| +300 | 4.00 | 3/1 | 25% | $300 |
| +350 | 4.50 | 7/2 | 22% | $350 |
| +400 | 5.00 | 4/1 | 20% | $400 |
| +500 | 6.00 | 5/1 | 17% | $500 |
| +600 | 7.00 | 6/1 | 14% | $600 |
| +700 | 8.00 | 7/1 | 13% | $700 |
| +750 | 8.50 | 15/2 | 12% | $750 |
| +1000 | 11.00 | 10/1 | 9% | $1000 |
Implied win % includes the sportsbook’s margin (the vig), so both sides of a real market add up to more than 100%. Enter any price above to see all four numbers for odds not in the chart.
Common questions
- How do you read American betting odds?
- A minus sign marks the favorite and shows how much you must risk to win $100 — −150 means risk $150 to win $100. A plus sign marks the underdog and shows the profit on a $100 bet — +150 means win $150 on $100. The bigger the number, the bigger the favorite (−) or underdog (+).
- What does +150 mean in betting?
- +150 is an underdog price. A $100 bet returns $150 in profit ($250 back in total). In decimal odds that's 2.50, in fractional it's 3/2, and it implies about a 40% chance of winning.
- What does −110 mean?
- −110 is the standard price on a point spread or total: you risk $110 to win $100. It implies about a 52.4% break-even win rate — the extra over a coin flip is the sportsbook's margin, the vig.
- What does +100 (or −100) mean?
- +100 is even money: a $100 bet wins $100. Some books write the same price as −100. Either way it's 2.00 in decimal, 1/1 fractional, and an implied 50% chance.
- How do you convert odds to an implied probability?
- For decimal odds, probability = 1 ÷ decimal (2.50 → 40%). For a positive American price, 100 ÷ (odds + 100). For a negative price, odds ÷ (odds + 100), ignoring the sign. This converter does it for you as you type.
More free tools
Track every bet automatically
Stop doing the math by hand. Bankroll Guardian logs your bets and shows P&L, ROI, CLV and more — free to start, no card required.