+550 Odds Explained
- Decimal
- 6.50
- American
- +550
- Fractional
- 11/2
- Implied probability
- 15.38%
- Polymarket
- 15¢
- $100 wins
- 550.00
- American
- +550
- Fractional
- 11/2
- Implied probability
- 15.38%
- Polymarket
- 15¢
- Profit
- 550.00
- Total return
- 650.00
6.500 decimal, +550 American, 15.38% implied probability
The price +550 converts to 6.50 decimal odds and 11/2 fractional odds. Read as a probability it says the bookmaker prices this outcome at 15.38%, 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 15¢.
What +550 pays
A 100 stake at +550 returns 650.00 in total: your 100 back plus 550.00 profit. To win exactly 100 you would stake 18.18. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 55.00 | 65.00 |
| 25 | 137.50 | 162.50 |
| 50 | 275.00 | 325.00 |
| 100 | 550.00 | 650.00 |
| 500 | 2,750.00 | 3,250.00 |
| 1,000 | 5,500.00 | 6,500.00 |
Break-even and long-run results
The implied probability of +550 is 15.38%, and that number is also the break-even win rate: win more often than 15.38% 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 |
|---|---|
| 15% | -2.5% |
| 50% | 225.0% |
| 55% | 257.5% |
| 60% | 290.0% |
| 65% | 322.5% |
With an implied chance of 15.38%, a bet at +550 is expected to lose most of the time and to pay 550.00 on 100 when it does not. Outright markets, correct scores and big upsets are where these prices appear, and they are the prices bookmakers shade the hardest.
The vig at +550
If both sides of a two-way market were priced at +550, the implied probabilities would add up to -69.23% above 100%. That excess is the overround, or vig; as a share of stakes it is a -225.00% 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.
+550 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +550 is worth 6.390 decimal (+539 American); at 5% it drops to 6.225 (+523). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 6.390 | +539 | 15.65% |
| 5% | 6.225 | +523 | 16.06% |
Same price in other formats
Nearby prices
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Frequently asked questions
What does +550 mean in betting?
+550 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +550 the implied probability is 15.38% and a 100 stake returns 650.00.
What is +550 in decimal odds?
+550 converts to 6.500 in decimal odds (usually shown as 6.50). Decimal odds are the total return per unit staked, so multiply your stake by 6.500 to get the return.
What is +550 as a fraction?
+550 is 11/2 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 +550?
A 100 stake at +550 wins 550.00 in profit and returns 650.00 including the stake. To win exactly 100 you would stake 18.18.
What win rate do I need at +550?
The break-even win rate equals the implied probability, 15.38%. Winning more often than that at this price is profitable over the long run; winning less often loses money.