+123 Odds Explained
- Decimal
- 2.23
- American
- +123
- Fractional
- 123/100
- Implied probability
- 44.84%
- Polymarket
- 45¢
- $100 wins
- 123.00
- American
- +123
- Fractional
- 123/100
- Implied probability
- 44.84%
- Polymarket
- 45¢
- Profit
- 123.00
- Total return
- 223.00
2.230 decimal, +123 American, 44.84% implied probability
The price +123 converts to 2.23 decimal odds and 123/100 fractional odds. Read as a probability it says the bookmaker prices this outcome at 44.84%, 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 45¢.
What +123 pays
A 100 stake at +123 returns 223.00 in total: your 100 back plus 123.00 profit. To win exactly 100 you would stake 81.30. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 12.30 | 22.30 |
| 25 | 30.75 | 55.75 |
| 50 | 61.50 | 111.50 |
| 100 | 123.00 | 223.00 |
| 500 | 615.00 | 1,115.00 |
| 1,000 | 1,230.00 | 2,230.00 |
Break-even and long-run results
The implied probability of +123 is 44.84%, and that number is also the break-even win rate: win more often than 44.84% 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 |
|---|---|
| 45% | 0.3% |
| 50% | 11.5% |
| 55% | 22.7% |
| 60% | 33.8% |
| 65% | 45.0% |
At 44.84% implied, +123 is a moderate underdog. A bet here wins less than half the time by the bookmaker's reckoning, but each win pays 123.00 per 100. Draws in soccer, the second favourite in a three-horse race and road teams in close games are typical residents of this range.
The vig at +123
If both sides of a two-way market were priced at +123, the implied probabilities would add up to -10.31% above 100%. That excess is the overround, or vig; as a share of stakes it is a -11.50% 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.
+123 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +123 is worth 2.205 decimal (+121 American); at 5% it drops to 2.169 (+117). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 2.205 | +121 | 45.34% |
| 5% | 2.169 | +117 | 46.11% |
Same price in other formats
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +123 mean in betting?
+123 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +123 the implied probability is 44.84% and a 100 stake returns 223.00.
What is +123 in decimal odds?
+123 converts to 2.230 in decimal odds (usually shown as 2.23). Decimal odds are the total return per unit staked, so multiply your stake by 2.230 to get the return.
What is +123 as a fraction?
+123 is 123/100 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 +123?
A 100 stake at +123 wins 123.00 in profit and returns 223.00 including the stake. To win exactly 100 you would stake 81.30.
What win rate do I need at +123?
The break-even win rate equals the implied probability, 44.84%. Winning more often than that at this price is profitable over the long run; winning less often loses money.