-495 Odds Explained
- Decimal
- 1.20
- American
- -495
- Fractional
- 20/99
- Implied probability
- 83.19%
- Polymarket
- 83¢
- $100 wins
- 20.20
- American
- -495
- Fractional
- 20/99
- Implied probability
- 83.19%
- Polymarket
- 83¢
- Profit
- 20.20
- Total return
- 120.20
1.202 decimal, -495 American, 83.19% implied probability
-495 is an American price:
the minus sign marks a favourite, and the number is the stake needed to win 100
. Every other format describes the same chance: 1.20 decimal, 20/99 fractional, 83.19% implied probability, 83¢ on Polymarket.
What -495 pays
A 100 stake at -495 returns 120.20 in total: your 100 back plus 20.20 profit. To win exactly 100 you would stake 495.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 2.02 | 12.02 |
| 25 | 5.05 | 30.05 |
| 50 | 10.10 | 60.10 |
| 100 | 20.20 | 120.20 |
| 500 | 101.01 | 601.01 |
| 1,000 | 202.02 | 1,202.02 |
Break-even and long-run results
The implied probability of -495 is 83.19%, and that number is also the break-even win rate: win more often than 83.19% 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% | -39.9% |
| 55% | -33.9% |
| 60% | -27.9% |
| 65% | -21.9% |
| 83% | -0.2% |
A price of -495 is deep odds-on. Bookmakers quote it when an outcome is close to a formality, and the margin they take is proportionally large at this end of the market. Sharp bettors tend to look at the other side of such a market, or at the exchange, where the same favourite is often available a tick or two better.
The vig at -495
If both sides of a two-way market were priced at -495, the implied probabilities would add up to 66.39% above 100%. That excess is the overround, or vig; as a share of stakes it is a 39.90% 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.
-495 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission -495 is worth 1.198 decimal (-505 American); at 5% it drops to 1.192 (-521). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.198 | -505 | 83.47% |
| 5% | 1.192 | -521 | 83.90% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does -495 mean in betting?
-495 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At -495 the implied probability is 83.19% and a 100 stake returns 120.20.
What is -495 in decimal odds?
-495 converts to 1.202 in decimal odds (usually shown as 1.20). Decimal odds are the total return per unit staked, so multiply your stake by 1.202 to get the return.
What is -495 as a fraction?
-495 is 20/99 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 -495?
A 100 stake at -495 wins 20.20 in profit and returns 120.20 including the stake. To win exactly 100 you would stake 495.00.
What win rate do I need at -495?
The break-even win rate equals the implied probability, 83.19%. Winning more often than that at this price is profitable over the long run; winning less often loses money.