+408 Odds Explained
- Decimal
- 5.08
- American
- +408
- Fractional
- 102/25
- Implied probability
- 19.69%
- Polymarket
- 20¢
- $100 wins
- 408.00
- American
- +408
- Fractional
- 102/25
- Implied probability
- 19.69%
- Polymarket
- 20¢
- Profit
- 408.00
- Total return
- 508.00
5.080 decimal, +408 American, 19.69% implied probability
American odds of +408 mean
a 100 stake wins 408
. In decimal notation that is 5.08, in fractional notation 102/25, and the implied probability is 19.69%. On a prediction market the same price is a 20¢ share.
What +408 pays
A 100 stake at +408 returns 508.00 in total: your 100 back plus 408.00 profit. To win exactly 100 you would stake 24.51. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 40.80 | 50.80 |
| 25 | 102.00 | 127.00 |
| 50 | 204.00 | 254.00 |
| 100 | 408.00 | 508.00 |
| 500 | 2,040.00 | 2,540.00 |
| 1,000 | 4,080.00 | 5,080.00 |
Break-even and long-run results
The implied probability of +408 is 19.69%, and that number is also the break-even win rate: win more often than 19.69% 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 |
|---|---|
| 20% | 1.6% |
| 50% | 154.0% |
| 55% | 179.4% |
| 60% | 204.8% |
| 65% | 230.2% |
With an implied chance of 19.69%, a bet at +408 is expected to lose most of the time and to pay 408.00 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 +408
If both sides of a two-way market were priced at +408, the implied probabilities would add up to -60.63% above 100%. That excess is the overround, or vig; as a share of stakes it is a -154.00% 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.
+408 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +408 is worth 4.998 decimal (+400 American); at 5% it drops to 4.876 (+388). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 4.998 | +400 | 20.01% |
| 5% | 4.876 | +388 | 20.51% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +408 mean in betting?
+408 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +408 the implied probability is 19.69% and a 100 stake returns 508.00.
What is +408 in decimal odds?
+408 converts to 5.080 in decimal odds (usually shown as 5.08). Decimal odds are the total return per unit staked, so multiply your stake by 5.080 to get the return.
What is +408 as a fraction?
+408 is 102/25 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 +408?
A 100 stake at +408 wins 408.00 in profit and returns 508.00 including the stake. To win exactly 100 you would stake 24.51.
What win rate do I need at +408?
The break-even win rate equals the implied probability, 19.69%. Winning more often than that at this price is profitable over the long run; winning less often loses money.