+500 Odds Explained
- Decimal
- 6.00
- American
- +500
- Fractional
- 5/1
- Implied probability
- 16.67%
- Polymarket
- 17¢
- $100 wins
- 500.00
- American
- +500
- Fractional
- 5/1
- Implied probability
- 16.67%
- Polymarket
- 17¢
- Profit
- 500.00
- Total return
- 600.00
6.000 decimal, +500 American, 16.67% implied probability
+500 is an American price:
the plus sign marks an underdog, and the number is the profit on a 100 stake
. Every other format describes the same chance: 6.00 decimal, 5/1 fractional, 16.67% implied probability, 17¢ on Polymarket.
What +500 pays
A 100 stake at +500 returns 600.00 in total: your 100 back plus 500.00 profit. To win exactly 100 you would stake 20.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 50.00 | 60.00 |
| 25 | 125.00 | 150.00 |
| 50 | 250.00 | 300.00 |
| 100 | 500.00 | 600.00 |
| 500 | 2,500.00 | 3,000.00 |
| 1,000 | 5,000.00 | 6,000.00 |
Break-even and long-run results
The implied probability of +500 is 16.67%, and that number is also the break-even win rate: win more often than 16.67% 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 |
|---|---|
| 17% | 2.0% |
| 50% | 200.0% |
| 55% | 230.0% |
| 60% | 260.0% |
| 65% | 290.0% |
+500 is a longshot. The bookmaker prices the outcome at 16.67%, and the payout of 500.00 per 100 staked is the compensation for how rarely it lands. Longshots carry more margin than any other part of the market, which is why devigging methods disagree most at prices like this one.
The vig at +500
If both sides of a two-way market were priced at +500, the implied probabilities would add up to -66.67% above 100%. That excess is the overround, or vig; as a share of stakes it is a -200.00% 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.
+500 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +500 is worth 5.900 decimal (+490 American); at 5% it drops to 5.750 (+475). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 5.900 | +490 | 16.95% |
| 5% | 5.750 | +475 | 17.39% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +500 mean in betting?
+500 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +500 the implied probability is 16.67% and a 100 stake returns 600.00.
What is +500 in decimal odds?
+500 converts to 6.000 in decimal odds (usually shown as 6.00). Decimal odds are the total return per unit staked, so multiply your stake by 6.000 to get the return.
What is +500 as a fraction?
+500 is 5/1 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 +500?
A 100 stake at +500 wins 500.00 in profit and returns 600.00 including the stake. To win exactly 100 you would stake 20.00.
What win rate do I need at +500?
The break-even win rate equals the implied probability, 16.67%. Winning more often than that at this price is profitable over the long run; winning less often loses money.