-347 Odds Explained
- Decimal
- 1.29
- American
- -347
- Fractional
- 17/59
- Implied probability
- 77.63%
- Polymarket
- 78¢
- $100 wins
- 28.82
- The fraction shown is the closest simple fraction to the odds rounded to 3 decimals, not an exact match.
- American
- -347
- Fractional
- 17/59
- Implied probability
- 77.63%
- Polymarket
- 78¢
- Profit
- 28.82
- Total return
- 128.82
1.288 decimal, -347 American, 77.63% implied probability
-347 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: 1.29 decimal, 17/59 fractional, 77.63% implied probability, 78¢ on Polymarket.
What -347 pays
A 100 stake at -347 returns 128.82 in total: your 100 back plus 28.82 profit. To win exactly 100 you would stake 347.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 2.88 | 12.88 |
| 25 | 7.20 | 32.20 |
| 50 | 14.41 | 64.41 |
| 100 | 28.82 | 128.82 |
| 500 | 144.09 | 644.09 |
| 1,000 | 288.18 | 1,288.18 |
Break-even and long-run results
The implied probability of -347 is 77.63%, and that number is also the break-even win rate: win more often than 77.63% 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% | -35.6% |
| 55% | -29.1% |
| 60% | -22.7% |
| 65% | -16.3% |
| 78% | 0.5% |
A price of -347 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 -347
If both sides of a two-way market were priced at -347, the implied probabilities would add up to 55.26% above 100%. That excess is the overround, or vig; as a share of stakes it is a 35.59% 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.
-347 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission -347 is worth 1.282 decimal (-354 American); at 5% it drops to 1.274 (-365). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 1.282 | -354 | 77.98% |
| 5% | 1.274 | -365 | 78.51% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does -347 mean in betting?
-347 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At -347 the implied probability is 77.63% and a 100 stake returns 128.82.
What is -347 in decimal odds?
-347 converts to 1.288 in decimal odds (usually shown as 1.29). Decimal odds are the total return per unit staked, so multiply your stake by 1.288 to get the return.
What is -347 as a fraction?
-347 is 17/59 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 -347?
A 100 stake at -347 wins 28.82 in profit and returns 128.82 including the stake. To win exactly 100 you would stake 347.00.
What win rate do I need at -347?
The break-even win rate equals the implied probability, 77.63%. Winning more often than that at this price is profitable over the long run; winning less often loses money.