+855 Odds Explained
- Decimal
- 9.55
- American
- +855
- Fractional
- 171/20
- Implied probability
- 10.47%
- Polymarket
- 10¢
- $100 wins
- 855.00
- American
- +855
- Fractional
- 171/20
- Implied probability
- 10.47%
- Polymarket
- 10¢
- Profit
- 855.00
- Total return
- 955.00
9.550 decimal, +855 American, 10.47% implied probability
American odds of +855 mean
a 100 stake wins 855
. In decimal notation that is 9.55, in fractional notation 171/20, and the implied probability is 10.47%. On a prediction market the same price is a 10¢ share.
What +855 pays
A 100 stake at +855 returns 955.00 in total: your 100 back plus 855.00 profit. To win exactly 100 you would stake 11.70. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 85.50 | 95.50 |
| 25 | 213.75 | 238.75 |
| 50 | 427.50 | 477.50 |
| 100 | 855.00 | 955.00 |
| 500 | 4,275.00 | 4,775.00 |
| 1,000 | 8,550.00 | 9,550.00 |
Break-even and long-run results
The implied probability of +855 is 10.47%, and that number is also the break-even win rate: win more often than 10.47% 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 |
|---|---|
| 10% | -4.5% |
| 50% | 377.5% |
| 55% | 425.3% |
| 60% | 473.0% |
| 65% | 520.8% |
With an implied chance of 10.47%, a bet at +855 is expected to lose most of the time and to pay 855.00 on 100 when it does not. Outright markets, correct scores and big upsets are where these prices appear, and they are the prices bookmakers shade the hardest.
The vig at +855
If both sides of a two-way market were priced at +855, the implied probabilities would add up to -79.06% above 100%. That excess is the overround, or vig; as a share of stakes it is a -377.50% 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.
+855 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +855 is worth 9.379 decimal (+838 American); at 5% it drops to 9.123 (+812). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 9.379 | +838 | 10.66% |
| 5% | 9.123 | +812 | 10.96% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +855 mean in betting?
+855 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +855 the implied probability is 10.47% and a 100 stake returns 955.00.
What is +855 in decimal odds?
+855 converts to 9.550 in decimal odds (usually shown as 9.55). Decimal odds are the total return per unit staked, so multiply your stake by 9.550 to get the return.
What is +855 as a fraction?
+855 is 171/20 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 +855?
A 100 stake at +855 wins 855.00 in profit and returns 955.00 including the stake. To win exactly 100 you would stake 11.70.
What win rate do I need at +855?
The break-even win rate equals the implied probability, 10.47%. Winning more often than that at this price is profitable over the long run; winning less often loses money.