-228 Odds Explained
- Decimal
- 1.44
- American
- -228
- Fractional
- 25/57
- Implied probability
- 69.51%
- Polymarket
- 70¢
- $100 wins
- 43.86
- American
- -228
- Fractional
- 25/57
- Implied probability
- 69.51%
- Polymarket
- 70¢
- Profit
- 43.86
- Total return
- 143.86
1.439 decimal, -228 American, 69.51% implied probability
The price -228 converts to 1.44 decimal odds and 25/57 fractional odds. Read as a probability it says the bookmaker prices this outcome at 69.51%, 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 70¢.
What -228 pays
A 100 stake at -228 returns 143.86 in total: your 100 back plus 43.86 profit. To win exactly 100 you would stake 228.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 4.39 | 14.39 |
| 25 | 10.96 | 35.96 |
| 50 | 21.93 | 71.93 |
| 100 | 43.86 | 143.86 |
| 500 | 219.30 | 719.30 |
| 1,000 | 438.60 | 1,438.60 |
Break-even and long-run results
The implied probability of -228 is 69.51%, and that number is also the break-even win rate: win more often than 69.51% 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% | -28.1% |
| 55% | -20.9% |
| 60% | -13.7% |
| 65% | -6.5% |
| 70% | 0.7% |
-228 marks a clear favourite without being a lock: the implied chance is 69.51%, 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 -228
If both sides of a two-way market were priced at -228, the implied probabilities would add up to 39.02% above 100%. That excess is the overround, or vig; as a share of stakes it is a 28.07% 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.
-228 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission -228 is worth 1.430 decimal (-233 American); at 5% it drops to 1.417 (-240). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.430 | -233 | 69.94% |
| 5% | 1.417 | -240 | 70.59% |
Same price in other formats
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does -228 mean in betting?
-228 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At -228 the implied probability is 69.51% and a 100 stake returns 143.86.
What is -228 in decimal odds?
-228 converts to 1.439 in decimal odds (usually shown as 1.44). Decimal odds are the total return per unit staked, so multiply your stake by 1.439 to get the return.
What is -228 as a fraction?
-228 is 25/57 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 -228?
A 100 stake at -228 wins 43.86 in profit and returns 143.86 including the stake. To win exactly 100 you would stake 228.00.
What win rate do I need at -228?
The break-even win rate equals the implied probability, 69.51%. Winning more often than that at this price is profitable over the long run; winning less often loses money.