+131 Odds Explained
- Decimal
- 2.31
- American
- +131
- Fractional
- 131/100
- Implied probability
- 43.29%
- Polymarket
- 43¢
- $100 wins
- 131.00
- American
- +131
- Fractional
- 131/100
- Implied probability
- 43.29%
- Polymarket
- 43¢
- Profit
- 131.00
- Total return
- 231.00
2.310 decimal, +131 American, 43.29% implied probability
+131 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: 2.31 decimal, 131/100 fractional, 43.29% implied probability, 43¢ on Polymarket.
What +131 pays
A 100 stake at +131 returns 231.00 in total: your 100 back plus 131.00 profit. To win exactly 100 you would stake 76.34. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 13.10 | 23.10 |
| 25 | 32.75 | 57.75 |
| 50 | 65.50 | 115.50 |
| 100 | 131.00 | 231.00 |
| 500 | 655.00 | 1,155.00 |
| 1,000 | 1,310.00 | 2,310.00 |
Break-even and long-run results
The implied probability of +131 is 43.29%, and that number is also the break-even win rate: win more often than 43.29% 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 |
|---|---|
| 43% | -0.7% |
| 50% | 15.5% |
| 55% | 27.1% |
| 60% | 38.6% |
| 65% | 50.2% |
+131 is an underdog price: the bookmaker gives this outcome an implied chance of 43.29%, and the payout of 131.00 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 +131
If both sides of a two-way market were priced at +131, the implied probabilities would add up to -13.42% above 100%. That excess is the overround, or vig; as a share of stakes it is a -15.50% 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.
+131 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +131 is worth 2.284 decimal (+128 American); at 5% it drops to 2.245 (+124). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 2.284 | +128 | 43.79% |
| 5% | 2.245 | +124 | 44.55% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +131 mean in betting?
+131 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +131 the implied probability is 43.29% and a 100 stake returns 231.00.
What is +131 in decimal odds?
+131 converts to 2.310 in decimal odds (usually shown as 2.31). Decimal odds are the total return per unit staked, so multiply your stake by 2.310 to get the return.
What is +131 as a fraction?
+131 is 131/100 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 +131?
A 100 stake at +131 wins 131.00 in profit and returns 231.00 including the stake. To win exactly 100 you would stake 76.34.
What win rate do I need at +131?
The break-even win rate equals the implied probability, 43.29%. Winning more often than that at this price is profitable over the long run; winning less often loses money.