-230 Odds Explained
- Decimal
- 1.43
- American
- -230
- Fractional
- 10/23
- Implied probability
- 69.70%
- Polymarket
- 70¢
- $100 wins
- 43.48
- American
- -230
- Fractional
- 10/23
- Implied probability
- 69.70%
- Polymarket
- 70¢
- Profit
- 43.48
- Total return
- 143.48
1.435 decimal, -230 American, 69.70% implied probability
The price -230 converts to 1.43 decimal odds and 10/23 fractional odds. Read as a probability it says the bookmaker prices this outcome at 69.70%, 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 -230 pays
A 100 stake at -230 returns 143.48 in total: your 100 back plus 43.48 profit. To win exactly 100 you would stake 230.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 4.35 | 14.35 |
| 25 | 10.87 | 35.87 |
| 50 | 21.74 | 71.74 |
| 100 | 43.48 | 143.48 |
| 500 | 217.39 | 717.39 |
| 1,000 | 434.78 | 1,434.78 |
Break-even and long-run results
The implied probability of -230 is 69.70%, and that number is also the break-even win rate: win more often than 69.70% 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% | -28.3% |
| 55% | -21.1% |
| 60% | -13.9% |
| 65% | -6.7% |
| 70% | 0.4% |
With an implied probability of 69.70%, -230 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 -230
If both sides of a two-way market were priced at -230, the implied probabilities would add up to 39.39% above 100%. That excess is the overround, or vig; as a share of stakes it is a 28.26% 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.
-230 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission -230 is worth 1.426 decimal (-235 American); at 5% it drops to 1.413 (-242). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.426 | -235 | 70.12% |
| 5% | 1.413 | -242 | 70.77% |
Same price in other formats
Nearby prices
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Frequently asked questions
What does -230 mean in betting?
-230 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At -230 the implied probability is 69.70% and a 100 stake returns 143.48.
What is -230 in decimal odds?
-230 converts to 1.435 in decimal odds (usually shown as 1.43). Decimal odds are the total return per unit staked, so multiply your stake by 1.435 to get the return.
What is -230 as a fraction?
-230 is 10/23 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 -230?
A 100 stake at -230 wins 43.48 in profit and returns 143.48 including the stake. To win exactly 100 you would stake 230.00.
What win rate do I need at -230?
The break-even win rate equals the implied probability, 69.70%. Winning more often than that at this price is profitable over the long run; winning less often loses money.