+240 Odds Explained
- Decimal
- 3.40
- American
- +240
- Fractional
- 12/5
- Implied probability
- 29.41%
- Polymarket
- 29¢
- $100 wins
- 240.00
- American
- +240
- Fractional
- 12/5
- Implied probability
- 29.41%
- Polymarket
- 29¢
- Profit
- 240.00
- Total return
- 340.00
3.400 decimal, +240 American, 29.41% implied probability
American odds of +240 mean
a 100 stake wins 240
. In decimal notation that is 3.40, in fractional notation 12/5, and the implied probability is 29.41%. On a prediction market the same price is a 29¢ share.
What +240 pays
A 100 stake at +240 returns 340.00 in total: your 100 back plus 240.00 profit. To win exactly 100 you would stake 41.67. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 24.00 | 34.00 |
| 25 | 60.00 | 85.00 |
| 50 | 120.00 | 170.00 |
| 100 | 240.00 | 340.00 |
| 500 | 1,200.00 | 1,700.00 |
| 1,000 | 2,400.00 | 3,400.00 |
Break-even and long-run results
The implied probability of +240 is 29.41%, and that number is also the break-even win rate: win more often than 29.41% 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 |
|---|---|
| 29% | -1.4% |
| 50% | 70.0% |
| 55% | 87.0% |
| 60% | 104.0% |
| 65% | 121.0% |
At 29.41% implied, +240 is a moderate underdog. A bet here wins less than half the time by the bookmaker's reckoning, but each win pays 240.00 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 +240
If both sides of a two-way market were priced at +240, the implied probabilities would add up to -41.18% above 100%. That excess is the overround, or vig; as a share of stakes it is a -70.00% 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.
+240 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +240 is worth 3.352 decimal (+235 American); at 5% it drops to 3.280 (+228). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 3.352 | +235 | 29.83% |
| 5% | 3.280 | +228 | 30.49% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +240 mean in betting?
+240 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +240 the implied probability is 29.41% and a 100 stake returns 340.00.
What is +240 in decimal odds?
+240 converts to 3.400 in decimal odds (usually shown as 3.40). Decimal odds are the total return per unit staked, so multiply your stake by 3.400 to get the return.
What is +240 as a fraction?
+240 is 12/5 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 +240?
A 100 stake at +240 wins 240.00 in profit and returns 340.00 including the stake. To win exactly 100 you would stake 41.67.
What win rate do I need at +240?
The break-even win rate equals the implied probability, 29.41%. Winning more often than that at this price is profitable over the long run; winning less often loses money.