+830 Odds Explained
- Decimal
- 9.30
- American
- +830
- Fractional
- 83/10
- Implied probability
- 10.75%
- Polymarket
- 11¢
- $100 wins
- 830.00
- American
- +830
- Fractional
- 83/10
- Implied probability
- 10.75%
- Polymarket
- 11¢
- Profit
- 830.00
- Total return
- 930.00
9.300 decimal, +830 American, 10.75% implied probability
The price +830 converts to 9.30 decimal odds and 83/10 fractional odds. Read as a probability it says the bookmaker prices this outcome at 10.75%, which is the share of the time you would need to win just to break even. A prediction market would quote the same chance as 11¢.
What +830 pays
A 100 stake at +830 returns 930.00 in total: your 100 back plus 830.00 profit. To win exactly 100 you would stake 12.05. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 83.00 | 93.00 |
| 25 | 207.50 | 232.50 |
| 50 | 415.00 | 465.00 |
| 100 | 830.00 | 930.00 |
| 500 | 4,150.00 | 4,650.00 |
| 1,000 | 8,300.00 | 9,300.00 |
Break-even and long-run results
The implied probability of +830 is 10.75%, and that number is also the break-even win rate: win more often than 10.75% of the time at this price and you profit in the long run, win less often and you lose. The table shows the return on stake at a few win rates, including the break-even rate itself.
| Win rate | Return on stake |
|---|---|
| 11% | 2.3% |
| 50% | 365.0% |
| 55% | 411.5% |
| 60% | 458.0% |
| 65% | 504.5% |
+830 is a longshot. The bookmaker prices the outcome at 10.75%, and the payout of 830.00 per 100 staked is the compensation for how rarely it lands. Longshots carry more margin than any other part of the market, which is why devigging methods disagree most at prices like this one.
The vig at +830
If both sides of a two-way market were priced at +830, the implied probabilities would add up to -78.49% above 100%. That excess is the overround, or vig; as a share of stakes it is a -365.00% margin for the bookmaker. Removing it leaves fair odds of 2.00 decimal ( +100) on each side. Use the devig calculator to do the same for any market.
+830 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +830 is worth 9.134 decimal (+813 American); at 5% it drops to 8.885 (+789). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 9.134 | +813 | 10.95% |
| 5% | 8.885 | +789 | 11.25% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +830 mean in betting?
+830 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +830 the implied probability is 10.75% and a 100 stake returns 930.00.
What is +830 in decimal odds?
+830 converts to 9.300 in decimal odds (usually shown as 9.30). Decimal odds are the total return per unit staked, so multiply your stake by 9.300 to get the return.
What is +830 as a fraction?
+830 is 83/10 in fractional odds, the traditional bookmaker notation where the top number is profit and the bottom number is stake.
How much do I win on a 100 bet at +830?
A 100 stake at +830 wins 830.00 in profit and returns 930.00 including the stake. To win exactly 100 you would stake 12.05.
What win rate do I need at +830?
The break-even win rate equals the implied probability, 10.75%. Winning more often than that at this price is profitable over the long run; winning less often loses money.