-280 Odds Explained
- Decimal
- 1.36
- American
- -280
- Fractional
- 5/14
- Implied probability
- 73.68%
- Polymarket
- 74¢
- $100 wins
- 35.71
- American
- -280
- Fractional
- 5/14
- Implied probability
- 73.68%
- Polymarket
- 74¢
- Profit
- 35.71
- Total return
- 135.71
1.357 decimal, -280 American, 73.68% implied probability
The price -280 converts to 1.36 decimal odds and 5/14 fractional odds. Read as a probability it says the bookmaker prices this outcome at 73.68%, 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 74¢.
What -280 pays
A 100 stake at -280 returns 135.71 in total: your 100 back plus 35.71 profit. To win exactly 100 you would stake 280.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 3.57 | 13.57 |
| 25 | 8.93 | 33.93 |
| 50 | 17.86 | 67.86 |
| 100 | 35.71 | 135.71 |
| 500 | 178.57 | 678.57 |
| 1,000 | 357.14 | 1,357.14 |
Break-even and long-run results
The implied probability of -280 is 73.68%, and that number is also the break-even win rate: win more often than 73.68% 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% | -32.1% |
| 55% | -25.4% |
| 60% | -18.6% |
| 65% | -11.8% |
| 74% | 0.4% |
-280 marks a clear favourite without being a lock: the implied chance is 73.68%, so the bookmaker expects this outcome roughly two times in three. Moneylines on the better team in an evenly scheduled league, the higher-ranked tennis player, or the "under" in a low-total game are typical places to see it.
The vig at -280
If both sides of a two-way market were priced at -280, the implied probabilities would add up to 47.37% above 100%. That excess is the overround, or vig; as a share of stakes it is a 32.14% 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.
-280 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission -280 is worth 1.350 decimal (-286 American); at 5% it drops to 1.339 (-295). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.350 | -286 | 74.07% |
| 5% | 1.339 | -295 | 74.67% |
Same price in other formats
Nearby prices
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Frequently asked questions
What does -280 mean in betting?
-280 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At -280 the implied probability is 73.68% and a 100 stake returns 135.71.
What is -280 in decimal odds?
-280 converts to 1.357 in decimal odds (usually shown as 1.36). Decimal odds are the total return per unit staked, so multiply your stake by 1.357 to get the return.
What is -280 as a fraction?
-280 is 5/14 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 -280?
A 100 stake at -280 wins 35.71 in profit and returns 135.71 including the stake. To win exactly 100 you would stake 280.00.
What win rate do I need at -280?
The break-even win rate equals the implied probability, 73.68%. Winning more often than that at this price is profitable over the long run; winning less often loses money.