−320 odds: what they mean and what they pay
At −320 you bet $320 to win $100 in profit, $420 back in all. The price implies a 76.19% chance, so you need to win more than 76.19% of these bets to come out ahead.
The same price in every format
| American | −320 |
|---|---|
| Decimal | 1.312 |
| Fractional | 5/16 |
| Implied chance | 76.19% |
| Break-even win rate | 76.19% |
What −320 pays
| Bet | Profit if it wins | Total back |
|---|---|---|
| $10 | $3.12 | $13.12 |
| $25 | $7.81 | $32.81 |
| $50 | $15.62 | $65.62 |
| $100 | $31.25 | $131.25 |
| $250 | $78.12 | $328.12 |
| $1,000 | $312.50 | $1,312.50 |
Is −320 good odds?
It depends on how likely the bet is to win, not on the number itself. −320 is a good price on a side that wins more than 76.19% of the time and a bad one on a side that wins less. If a market kept nothing, the other side of a −320 bet would be +320; 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, −320 makes the side a heavy favorite.
What a better price is worth
Find −310 instead of −320 on the same bet and the win rate you need drops from 76.19% to 75.61%. Over 100 bets of $100 that win 76.19% of the time, −320 breaks even and −310 comes out about $76.80 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.
−320 in a parlay
Two legs at −320 combine to decimal 1.723 (about −138): $100 would return $172.27. Each leg's cut compounds, so a parlay keeps more for the book than a single bet. Parlay calculator.
Questions
What does -320 mean in betting?
-320 means you bet $320 to win $100 in profit, returning $420 in all.
How much do I win on a $100 bet at -320?
$31.25 profit, $131.25 back in all if it wins.
What is -320 as a percentage?
-320 implies a 76.19% chance. That's also the share of bets you'd need to win to break even.
What is -320 in decimal odds?
1.312. In fractional odds it's about 5/16.
Is -320 a good bet?
Only if the side wins more than 76.19% 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.