+291 Odds Explained
- Decimal
- 3.91
- American
- +291
- Fractional
- 291/100
- Implied probability
- 25.58%
- Polymarket
- 26¢
- $100 wins
- 291.00
- American
- +291
- Fractional
- 291/100
- Implied probability
- 25.58%
- Polymarket
- 26¢
- Profit
- 291.00
- Total return
- 391.00
3.910 decimal, +291 American, 25.58% implied probability
+291 is an American price:
the plus sign marks an underdog, and the number is the profit on a 100 stake
. Every other format describes the same chance: 3.91 decimal, 291/100 fractional, 25.58% implied probability, 26¢ on Polymarket.
What +291 pays
A 100 stake at +291 returns 391.00 in total: your 100 back plus 291.00 profit. To win exactly 100 you would stake 34.36. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 29.10 | 39.10 |
| 25 | 72.75 | 97.75 |
| 50 | 145.50 | 195.50 |
| 100 | 291.00 | 391.00 |
| 500 | 1,455.00 | 1,955.00 |
| 1,000 | 2,910.00 | 3,910.00 |
Break-even and long-run results
The implied probability of +291 is 25.58%, and that number is also the break-even win rate: win more often than 25.58% 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 |
|---|---|
| 26% | 1.7% |
| 50% | 95.5% |
| 55% | 115.1% |
| 60% | 134.6% |
| 65% | 154.2% |
At 25.58% implied, +291 is a moderate underdog. A bet here wins less than half the time by the bookmaker's reckoning, but each win pays 291.00 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 +291
If both sides of a two-way market were priced at +291, the implied probabilities would add up to -48.85% above 100%. That excess is the overround, or vig; as a share of stakes it is a -95.50% 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.
+291 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +291 is worth 3.852 decimal (+285 American); at 5% it drops to 3.764 (+276). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 3.852 | +285 | 25.96% |
| 5% | 3.764 | +276 | 26.56% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +291 mean in betting?
+291 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +291 the implied probability is 25.58% and a 100 stake returns 391.00.
What is +291 in decimal odds?
+291 converts to 3.910 in decimal odds (usually shown as 3.91). Decimal odds are the total return per unit staked, so multiply your stake by 3.910 to get the return.
What is +291 as a fraction?
+291 is 291/100 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 +291?
A 100 stake at +291 wins 291.00 in profit and returns 391.00 including the stake. To win exactly 100 you would stake 34.36.
What win rate do I need at +291?
The break-even win rate equals the implied probability, 25.58%. Winning more often than that at this price is profitable over the long run; winning less often loses money.