+404 Odds Explained
- Decimal
- 5.04
- American
- +404
- Fractional
- 101/25
- Implied probability
- 19.84%
- Polymarket
- 20¢
- $100 wins
- 404.00
- American
- +404
- Fractional
- 101/25
- Implied probability
- 19.84%
- Polymarket
- 20¢
- Profit
- 404.00
- Total return
- 504.00
5.040 decimal, +404 American, 19.84% implied probability
American odds of +404 mean
a 100 stake wins 404
. In decimal notation that is 5.04, in fractional notation 101/25, and the implied probability is 19.84%. On a prediction market the same price is a 20¢ share.
What +404 pays
A 100 stake at +404 returns 504.00 in total: your 100 back plus 404.00 profit. To win exactly 100 you would stake 24.75. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 40.40 | 50.40 |
| 25 | 101.00 | 126.00 |
| 50 | 202.00 | 252.00 |
| 100 | 404.00 | 504.00 |
| 500 | 2,020.00 | 2,520.00 |
| 1,000 | 4,040.00 | 5,040.00 |
Break-even and long-run results
The implied probability of +404 is 19.84%, and that number is also the break-even win rate: win more often than 19.84% 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% | 0.8% |
| 50% | 152.0% |
| 55% | 177.2% |
| 60% | 202.4% |
| 65% | 227.6% |
With an implied chance of 19.84%, a bet at +404 is expected to lose most of the time and to pay 404.00 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 +404
If both sides of a two-way market were priced at +404, the implied probabilities would add up to -60.32% above 100%. That excess is the overround, or vig; as a share of stakes it is a -152.00% 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.
+404 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +404 is worth 4.959 decimal (+396 American); at 5% it drops to 4.838 (+384). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 4.959 | +396 | 20.16% |
| 5% | 4.838 | +384 | 20.67% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +404 mean in betting?
+404 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +404 the implied probability is 19.84% and a 100 stake returns 504.00.
What is +404 in decimal odds?
+404 converts to 5.040 in decimal odds (usually shown as 5.04). Decimal odds are the total return per unit staked, so multiply your stake by 5.040 to get the return.
What is +404 as a fraction?
+404 is 101/25 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 +404?
A 100 stake at +404 wins 404.00 in profit and returns 504.00 including the stake. To win exactly 100 you would stake 24.75.
What win rate do I need at +404?
The break-even win rate equals the implied probability, 19.84%. Winning more often than that at this price is profitable over the long run; winning less often loses money.