-166 Odds Explained
- Decimal
- 1.60
- American
- -166
- Fractional
- 50/83
- Implied probability
- 62.41%
- Polymarket
- 62¢
- $100 wins
- 60.24
- American
- -166
- Fractional
- 50/83
- Implied probability
- 62.41%
- Polymarket
- 62¢
- Profit
- 60.24
- Total return
- 160.24
1.602 decimal, -166 American, 62.41% implied probability
American odds of -166 mean
you risk 166 to win 100
. In decimal notation that is 1.60, in fractional notation 50/83, and the implied probability is 62.41%. On a prediction market the same price is a 62¢ share.
What -166 pays
A 100 stake at -166 returns 160.24 in total: your 100 back plus 60.24 profit. To win exactly 100 you would stake 166.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 6.02 | 16.02 |
| 25 | 15.06 | 40.06 |
| 50 | 30.12 | 80.12 |
| 100 | 60.24 | 160.24 |
| 500 | 301.20 | 801.20 |
| 1,000 | 602.41 | 1,602.41 |
Break-even and long-run results
The implied probability of -166 is 62.41%, and that number is also the break-even win rate: win more often than 62.41% 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% | -19.9% |
| 55% | -11.9% |
| 60% | -3.9% |
| 62% | -0.7% |
| 65% | 4.2% |
With an implied probability of 62.41%, -166 is a moderate favourite. Prices in this band are where the bookmaker's margin is easiest to see: the opposite side of the market is usually priced a little longer than the fair line, and the two implied probabilities add up to more than 100%.
The vig at -166
If both sides of a two-way market were priced at -166, the implied probabilities would add up to 24.81% above 100%. That excess is the overround, or vig; as a share of stakes it is a 19.88% 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.
-166 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission -166 is worth 1.590 decimal (-169 American); at 5% it drops to 1.572 (-175). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.590 | -169 | 62.88% |
| 5% | 1.572 | -175 | 63.60% |
Same price in other formats
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does -166 mean in betting?
-166 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At -166 the implied probability is 62.41% and a 100 stake returns 160.24.
What is -166 in decimal odds?
-166 converts to 1.602 in decimal odds (usually shown as 1.60). Decimal odds are the total return per unit staked, so multiply your stake by 1.602 to get the return.
What is -166 as a fraction?
-166 is 50/83 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 -166?
A 100 stake at -166 wins 60.24 in profit and returns 160.24 including the stake. To win exactly 100 you would stake 166.00.
What win rate do I need at -166?
The break-even win rate equals the implied probability, 62.41%. Winning more often than that at this price is profitable over the long run; winning less often loses money.