+315 Odds Explained
- Decimal
- 4.15
- American
- +315
- Fractional
- 63/20
- Implied probability
- 24.10%
- Polymarket
- 24¢
- $100 wins
- 315.00
- American
- +315
- Fractional
- 63/20
- Implied probability
- 24.10%
- Polymarket
- 24¢
- Profit
- 315.00
- Total return
- 415.00
4.150 decimal, +315 American, 24.10% implied probability
American odds of +315 mean
a 100 stake wins 315
. In decimal notation that is 4.15, in fractional notation 63/20, and the implied probability is 24.10%. On a prediction market the same price is a 24¢ share.
What +315 pays
A 100 stake at +315 returns 415.00 in total: your 100 back plus 315.00 profit. To win exactly 100 you would stake 31.75. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 31.50 | 41.50 |
| 25 | 78.75 | 103.75 |
| 50 | 157.50 | 207.50 |
| 100 | 315.00 | 415.00 |
| 500 | 1,575.00 | 2,075.00 |
| 1,000 | 3,150.00 | 4,150.00 |
Break-even and long-run results
The implied probability of +315 is 24.10%, and that number is also the break-even win rate: win more often than 24.10% 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 |
|---|---|
| 24% | -0.4% |
| 50% | 107.5% |
| 55% | 128.3% |
| 60% | 149.0% |
| 65% | 169.8% |
+315 is a longshot. The bookmaker prices the outcome at 24.10%, and the payout of 315.00 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 +315
If both sides of a two-way market were priced at +315, the implied probabilities would add up to -51.81% above 100%. That excess is the overround, or vig; as a share of stakes it is a -107.50% 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.
+315 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +315 is worth 4.087 decimal (+309 American); at 5% it drops to 3.993 (+299). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 4.087 | +309 | 24.47% |
| 5% | 3.993 | +299 | 25.05% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +315 mean in betting?
+315 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +315 the implied probability is 24.10% and a 100 stake returns 415.00.
What is +315 in decimal odds?
+315 converts to 4.150 in decimal odds (usually shown as 4.15). Decimal odds are the total return per unit staked, so multiply your stake by 4.150 to get the return.
What is +315 as a fraction?
+315 is 63/20 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 +315?
A 100 stake at +315 wins 315.00 in profit and returns 415.00 including the stake. To win exactly 100 you would stake 31.75.
What win rate do I need at +315?
The break-even win rate equals the implied probability, 24.10%. Winning more often than that at this price is profitable over the long run; winning less often loses money.