−310 odds: what they mean and what they pay
At −310 you bet $310 to win $100 in profit, $410 back in all. The price implies a 75.61% chance, so you need to win more than 75.61% of these bets to come out ahead.
The same price in every format
| American | −310 |
|---|---|
| Decimal | 1.323 |
| Fractional | 10/31 |
| Implied chance | 75.61% |
| Break-even win rate | 75.61% |
What −310 pays
| Bet | Profit if it wins | Total back |
|---|---|---|
| $10 | $3.23 | $13.23 |
| $25 | $8.06 | $33.06 |
| $50 | $16.13 | $66.13 |
| $100 | $32.26 | $132.26 |
| $250 | $80.65 | $330.65 |
| $1,000 | $322.58 | $1,322.58 |
Is −310 good odds?
It depends on how likely the bet is to win, not on the number itself. −310 is a good price on a side that wins more than 75.61% of the time and a bad one on a side that wins less. If a market kept nothing, the other side of a −310 bet would be +310; real books price it worse than that, and the gap is their cut. At −110 on both sides, the most common spread and total price, the cut is 4.76%. Which book keeps the least differs: every sportsbook's cut, measured.
As a price, −310 makes the side a heavy favorite.
What a better price is worth
Find −300 instead of −310 on the same bet and the win rate you need drops from 75.61% to 75.00%. Over 100 bets of $100 that win 75.61% of the time, −310 breaks even and −300 comes out about $81.30 ahead: the same picks, a better price. Books often differ by that much on the same game: the board shows which one pays the most.
−310 in a parlay
Two legs at −310 combine to decimal 1.749 (about −133): $100 would return $174.92. Each leg's cut compounds, so a parlay keeps more for the book than a single bet. Parlay calculator.
Questions
What does -310 mean in betting?
-310 means you bet $310 to win $100 in profit, returning $410 in all.
How much do I win on a $100 bet at -310?
$32.26 profit, $132.26 back in all if it wins.
What is -310 as a percentage?
-310 implies a 75.61% chance. That's also the share of bets you'd need to win to break even.
What is -310 in decimal odds?
1.323. In fractional odds it's about 10/31.
Is -310 a good bet?
Only if the side wins more than 75.61% of the time. The price alone can't tell you: compare it with other sportsbooks' prices on the same bet, since a better price lowers the win rate you need.