-178 Odds Explained
- Decimal
- 1.56
- American
- -178
- Fractional
- 50/89
- Implied probability
- 64.03%
- Polymarket
- 64¢
- $100 wins
- 56.18
- American
- -178
- Fractional
- 50/89
- Implied probability
- 64.03%
- Polymarket
- 64¢
- Profit
- 56.18
- Total return
- 156.18
1.562 decimal, -178 American, 64.03% implied probability
American odds of -178 mean
you risk 178 to win 100
. In decimal notation that is 1.56, in fractional notation 50/89, and the implied probability is 64.03%. On a prediction market the same price is a 64¢ share.
What -178 pays
A 100 stake at -178 returns 156.18 in total: your 100 back plus 56.18 profit. To win exactly 100 you would stake 178.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 5.62 | 15.62 |
| 25 | 14.04 | 39.04 |
| 50 | 28.09 | 78.09 |
| 100 | 56.18 | 156.18 |
| 500 | 280.90 | 780.90 |
| 1,000 | 561.80 | 1,561.80 |
Break-even and long-run results
The implied probability of -178 is 64.03%, and that number is also the break-even win rate: win more often than 64.03% 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% | -21.9% |
| 55% | -14.1% |
| 60% | -6.3% |
| 64% | -0.0% |
| 65% | 1.5% |
-178 marks a clear favourite without being a lock: the implied chance is 64.03%, 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 -178
If both sides of a two-way market were priced at -178, the implied probabilities would add up to 28.06% above 100%. That excess is the overround, or vig; as a share of stakes it is a 21.91% 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.
-178 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission -178 is worth 1.551 decimal (-182 American); at 5% it drops to 1.534 (-187). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.551 | -182 | 64.49% |
| 5% | 1.534 | -187 | 65.20% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does -178 mean in betting?
-178 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At -178 the implied probability is 64.03% and a 100 stake returns 156.18.
What is -178 in decimal odds?
-178 converts to 1.562 in decimal odds (usually shown as 1.56). Decimal odds are the total return per unit staked, so multiply your stake by 1.562 to get the return.
What is -178 as a fraction?
-178 is 50/89 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 -178?
A 100 stake at -178 wins 56.18 in profit and returns 156.18 including the stake. To win exactly 100 you would stake 178.00.
What win rate do I need at -178?
The break-even win rate equals the implied probability, 64.03%. Winning more often than that at this price is profitable over the long run; winning less often loses money.