Odds converter and bet calculator
Convert odds between decimal, fractional, American and implied probability, or work out the return and the profit on a hypothetical stake.
Odds calculator
The calculator needs JavaScript. Common conversions:
| Decimal | Fractional | American | Implied probability | Hong Kong | Malay | Indonesian |
|---|---|---|---|---|---|---|
| 1.10 | 1/10 | −1000 | approximately90.91% | 0.10 | 0.10 | −10.00 |
| 1.25 | 1/4 | −400 | 80.00% | 0.25 | 0.25 | −4.00 |
| 1.50 | 1/2 | −200 | approximately66.67% | 0.50 | 0.50 | −2.00 |
| 1.80 | 4/5 | −125 | approximately55.56% | 0.80 | 0.80 | −1.25 |
| 1.91 | 91/100 | approximately−110 | approximately52.36% | 0.91 | 0.91 | approximately−1.10 |
| 2.00 | 1/1 | +100 | 50.00% | 1.00 | 1.00 | +1.00 |
| 2.50 | 3/2 | +150 | 40.00% | 1.50 | approximately−0.67 | +1.50 |
| 3.00 | 2/1 | +200 | approximately33.33% | 2.00 | −0.50 | +2.00 |
| 4.00 | 3/1 | +300 | 25.00% | 3.00 | approximately−0.33 | +3.00 |
| 5.00 | 4/1 | +400 | 20.00% | 4.00 | −0.25 | +4.00 |
| 10.00 | 9/1 | +900 | 10.00% | 9.00 | approximately−0.11 | +9.00 |
Total return per 1 staked, stake included. Example: 2.50
Profit per stake, as a fraction. Example: 3/2
+150 wins 150 on 100; −200 needs 200 to win 100
The chance the odds imply, bookmaker margin included
Profit per 1 staked. Example: 0.90
0.80 wins 0.80 per 1 staked; −0.80 stakes 0.80 to win 1
+1.50 wins 1.50 per 1 staked; −2.00 stakes 2 to win 1
Total return approximately—
Total return = stake × decimal odds
Net profit approximately—
Net profit = total return − stake
Implied probability approximately—
Implied probability = 1 ÷ decimal odds; it includes the bookmaker's margin
For illustration only. No bet is placed.
Good to know
- Implied probability includes the bookmaker's margin, so the probabilities of every outcome in one market add up to more than 100%.
- The calculator runs in your browser. Nothing you type is sent or stored, and no bet is placed.
- Odds show what a bet pays, never whether it wins. If betting stops being fun, read our responsible gambling page.