+250 Odds Explained
- Decimal
- 3.50
- American
- +250
- Fractional
- 5/2
- Implied probability
- 28.57%
- Polymarket
- 29¢
- $100 wins
- 250.00
- American
- +250
- Fractional
- 5/2
- Implied probability
- 28.57%
- Polymarket
- 29¢
- Profit
- 250.00
- Total return
- 350.00
3.500 decimal, +250 American, 28.57% implied probability
The price +250 converts to 3.50 decimal odds and 5/2 fractional odds. Read as a probability it says the bookmaker prices this outcome at 28.57%, 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 29¢.
What +250 pays
A 100 stake at +250 returns 350.00 in total: your 100 back plus 250.00 profit. To win exactly 100 you would stake 40.00. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 25.00 | 35.00 |
| 25 | 62.50 | 87.50 |
| 50 | 125.00 | 175.00 |
| 100 | 250.00 | 350.00 |
| 500 | 1,250.00 | 1,750.00 |
| 1,000 | 2,500.00 | 3,500.00 |
Break-even and long-run results
The implied probability of +250 is 28.57%, and that number is also the break-even win rate: win more often than 28.57% 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 |
|---|---|
| 29% | 1.5% |
| 50% | 75.0% |
| 55% | 92.5% |
| 60% | 110.0% |
| 65% | 127.5% |
+250 is an underdog price: the bookmaker gives this outcome an implied chance of 28.57%, and the payout of 250.00 on 100 reflects it. Underdogs in this band are where public money and bookmaker margin often disagree, so it pays to compare prices across books before taking one.
The vig at +250
If both sides of a two-way market were priced at +250, the implied probabilities would add up to -42.86% above 100%. That excess is the overround, or vig; as a share of stakes it is a -75.00% 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.
+250 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +250 is worth 3.450 decimal (+245 American); at 5% it drops to 3.375 (+238). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 3.450 | +245 | 28.99% |
| 5% | 3.375 | +238 | 29.63% |
Same price in other formats
Nearby prices
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Frequently asked questions
What does +250 mean in betting?
+250 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +250 the implied probability is 28.57% and a 100 stake returns 350.00.
What is +250 in decimal odds?
+250 converts to 3.500 in decimal odds (usually shown as 3.50). Decimal odds are the total return per unit staked, so multiply your stake by 3.500 to get the return.
What is +250 as a fraction?
+250 is 5/2 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 +250?
A 100 stake at +250 wins 250.00 in profit and returns 350.00 including the stake. To win exactly 100 you would stake 40.00.
What win rate do I need at +250?
The break-even win rate equals the implied probability, 28.57%. Winning more often than that at this price is profitable over the long run; winning less often loses money.