+170 Odds Explained
- Decimal
- 2.70
- American
- +170
- Fractional
- 17/10
- Implied probability
- 37.04%
- Polymarket
- 37¢
- $100 wins
- 170.00
- American
- +170
- Fractional
- 17/10
- Implied probability
- 37.04%
- Polymarket
- 37¢
- Profit
- 170.00
- Total return
- 270.00
2.700 decimal, +170 American, 37.04% implied probability
American odds of +170 mean
a 100 stake wins 170
. In decimal notation that is 2.70, in fractional notation 17/10, and the implied probability is 37.04%. On a prediction market the same price is a 37¢ share.
What +170 pays
A 100 stake at +170 returns 270.00 in total: your 100 back plus 170.00 profit. To win exactly 100 you would stake 58.82. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 17.00 | 27.00 |
| 25 | 42.50 | 67.50 |
| 50 | 85.00 | 135.00 |
| 100 | 170.00 | 270.00 |
| 500 | 850.00 | 1,350.00 |
| 1,000 | 1,700.00 | 2,700.00 |
Break-even and long-run results
The implied probability of +170 is 37.04%, and that number is also the break-even win rate: win more often than 37.04% 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 |
|---|---|
| 37% | -0.1% |
| 50% | 35.0% |
| 55% | 48.5% |
| 60% | 62.0% |
| 65% | 75.5% |
At 37.04% implied, +170 is a moderate underdog. A bet here wins less than half the time by the bookmaker's reckoning, but each win pays 170.00 per 100. Draws in soccer, the second favourite in a three-horse race and road teams in close games are typical residents of this range.
The vig at +170
If both sides of a two-way market were priced at +170, the implied probabilities would add up to -25.93% above 100%. That excess is the overround, or vig; as a share of stakes it is a -35.00% 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.
+170 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +170 is worth 2.666 decimal (+167 American); at 5% it drops to 2.615 (+162). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 2.666 | +167 | 37.51% |
| 5% | 2.615 | +162 | 38.24% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +170 mean in betting?
+170 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +170 the implied probability is 37.04% and a 100 stake returns 270.00.
What is +170 in decimal odds?
+170 converts to 2.700 in decimal odds (usually shown as 2.70). Decimal odds are the total return per unit staked, so multiply your stake by 2.700 to get the return.
What is +170 as a fraction?
+170 is 17/10 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 +170?
A 100 stake at +170 wins 170.00 in profit and returns 270.00 including the stake. To win exactly 100 you would stake 58.82.
What win rate do I need at +170?
The break-even win rate equals the implied probability, 37.04%. Winning more often than that at this price is profitable over the long run; winning less often loses money.