Even odds (+100): what they mean
At +100 a $100 bet wins $100.00 in profit, $200.00 back in all. The price implies a 50.00% chance, so you need to win more than 50.00% of these bets to come out ahead.
The same price in every format
| American | +100 |
|---|---|
| Decimal | 2.000 |
| Fractional | 1/1 |
| Implied chance | 50.00% |
| Break-even win rate | 50.00% |
What +100 pays
| Bet | Profit if it wins | Total back |
|---|---|---|
| $10 | $10.00 | $20.00 |
| $25 | $25.00 | $50.00 |
| $50 | $50.00 | $100.00 |
| $100 | $100.00 | $200.00 |
| $250 | $250.00 | $500.00 |
| $1,000 | $1,000.00 | $2,000.00 |
Is +100 good odds?
It depends on how likely the bet is to win, not on the number itself. +100 is a good price on a side that wins more than 50.00% of the time and a bad one on a side that wins less. If a market kept nothing, the other side of a +100 bet would be +100; 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, +100 makes the side close to even: at this price both sides of a game are often priced alike, and the gap from 50% is mostly the book's cut.
What a better price is worth
Find +105 instead of +100 on the same bet and the win rate you need drops from 50.00% to 48.78%. Over 100 bets of $100 that win 50.00% of the time, +100 breaks even and +105 comes out about $250.00 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.
+100 in a parlay
Two legs at +100 combine to decimal 4.000 (about +300): $100 would return $400.00. Each leg's cut compounds, so a parlay keeps more for the book than a single bet. Parlay calculator.
Questions
What does +100 mean in betting?
+100 means a $100 bet wins $100 in profit, returning $200 in all.
How much do I win on a $100 bet at +100?
$100.00 profit, $200.00 back in all if it wins.
What is +100 as a percentage?
+100 implies a 50.00% chance. That's also the share of bets you'd need to win to break even.
What is +100 in decimal odds?
2.000. In fractional odds it's about 1/1.
How often does a +100 bet win?
The price implies 50.00%, about 50 times in 100. The real chance can be higher or lower; the price includes the book's cut.