Odds calculator
Type the odds you see and how much you want to bet (or win). We’ll say what it pays in plain dollars.
Bet $10 at +100
you win $10
If it wins you get back $20: your $10 plus $10. If it loses, you lose the $10.
- In plain words
- +100 is even money: whatever you bet, you win the same again.
- Smallest version
- Bet $1 to win $1
- Every $10 bet wins
- $10
- Other formats
- +100 · 2.00 · Evens (1/1)
- Chance the odds suggest
- 50.0%, about 50 in 100
Even money: an evenly matched bet. You win exactly what you risk. The chance above is what the price implies, including the sportsbook’s cut, not a prediction.
Cheat sheet
Common prices, said in small money.
| Odds | Means | $10 wins | Chance |
|---|---|---|---|
| -300 | Bet $3 to win $1 | $3.33 | 75% |
| -200 | Bet $2 to win $1 | $5 | 67% |
| -150 | Bet $3 to win $2 | $6.67 | 60% |
| -110 | Bet $11 to win $10 | $9.09 | 52% |
| +100 | Bet $1 to win $1 | $10 | 50% |
| +150 | Bet $2 to win $3 | $15 | 40% |
| +200 | Bet $1 to win $2 | $20 | 33% |
| +300 | Bet $1 to win $3 | $30 | 25% |
Seeing odds like 1.91 or 10/11?
Sportsbooks outside the US often write odds differently. They’re the same prices in a different format, and the calculator above reads all of them.
- Decimal (1.91): what comes back for every $1 you bet, including that $1. At 1.91 a $1 bet returns $1.91, so you win 91¢. Under 2.00 is a favorite and over 2.00 is an underdog. Common in Europe, Canada, and Australia.
- Fractional (10/11): what you win compared with what you bet. 10/11 means win $10 for every $11 you bet, which is exactly -110. 3/2 means win $3 for every $2. Common in the UK and Ireland.
| American | Decimal | Fractional |
|---|---|---|
| -200 | 1.50 | 1/2 |
| -150 | 1.67 | 2/3 |
| -110 | 1.91 | 10/11 |
| +100 | 2.00 | Evens (1/1) |
| +150 | 2.50 | 3/2 |
| +200 | 3.00 | 2/1 |
| +300 | 4.00 | 3/1 |