-424 Odds Explained
- Decimal
- 1.24
- American
- -424
- Fractional
- 21/89
- Implied probability
- 80.92%
- Polymarket
- 81¢
- $100 wins
- 23.58
- The fraction shown is the closest simple fraction to the odds rounded to 3 decimals, not an exact match.
- American
- -424
- Fractional
- 21/89
- Implied probability
- 80.92%
- Polymarket
- 81¢
- Profit
- 23.58
- Total return
- 123.58
1.236 decimal, -424 American, 80.92% implied probability
The price -424 converts to 1.24 decimal odds and 21/89 fractional odds. Read as a probability it says the bookmaker prices this outcome at 80.92%, which is the share of the time you would need to win just to break even. A prediction market would quote the same chance as 81¢.
What -424 pays
A 100 stake at -424 returns 123.58 in total: your 100 back plus 23.58 profit. To win exactly 100 you would stake 424.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 2.36 | 12.36 |
| 25 | 5.90 | 30.90 |
| 50 | 11.79 | 61.79 |
| 100 | 23.58 | 123.58 |
| 500 | 117.92 | 617.92 |
| 1,000 | 235.85 | 1,235.85 |
Break-even and long-run results
The implied probability of -424 is 80.92%, and that number is also the break-even win rate: win more often than 80.92% 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 |
|---|---|
| 50% | -38.2% |
| 55% | -32.0% |
| 60% | -25.8% |
| 65% | -19.7% |
| 81% | 0.1% |
A price of -424 is deep odds-on. Bookmakers quote it when an outcome is close to a formality, and the margin they take is proportionally large at this end of the market. Sharp bettors tend to look at the other side of such a market, or at the exchange, where the same favourite is often available a tick or two better.
The vig at -424
If both sides of a two-way market were priced at -424, the implied probabilities would add up to 61.83% above 100%. That excess is the overround, or vig; as a share of stakes it is a 38.21% 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.
-424 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission -424 is worth 1.231 decimal (-433 American); at 5% it drops to 1.224 (-446). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.231 | -433 | 81.23% |
| 5% | 1.224 | -446 | 81.70% |
Same price in other formats
Nearby prices
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Frequently asked questions
What does -424 mean in betting?
-424 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At -424 the implied probability is 80.92% and a 100 stake returns 123.58.
What is -424 in decimal odds?
-424 converts to 1.236 in decimal odds (usually shown as 1.24). Decimal odds are the total return per unit staked, so multiply your stake by 1.236 to get the return.
What is -424 as a fraction?
-424 is 21/89 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 -424?
A 100 stake at -424 wins 23.58 in profit and returns 123.58 including the stake. To win exactly 100 you would stake 424.00.
What win rate do I need at -424?
The break-even win rate equals the implied probability, 80.92%. Winning more often than that at this price is profitable over the long run; winning less often loses money.