The first chart shows your chances of cashing the parlay size listed based on your straight bet win percentage. “SB Win %” stands for “Straight Bet Win Percentage”. So, if you hit 50% of your straight bets, you have a 25% chance of cashing a two leg parlay.
The second chart below shows the breakeven price you would need on your parlay based on the chance of winning the parlay as laid out in the first table. So, when your parlay is providing a payout ABOVE what is shown, you have value. In the second chart, “300” = +300 payout = 3/1 odds. So, since a two leg parlay of -110 prices yields a +265 payout at your book, by hitting 52.5% of your straight bets your fair value chances of hitting that 2 leg parlay is +262…but the book is paying you +265. So, you have value and an edge on two leg parlays.
In the case of a three leg parlay, with -110 prices, you are paid +595 by the book. So, if you hit 52.5% on your selections, you are in value since your fair value chances of hitting that three leg parlay (given your 52.5% win percentage) is +590…but the book pays you +595!
Your parlay value/edge over the house increases as your straight bet win percentage increases.
Good luck!
| Parlay Size | SB Win % = 50% | SB Win % = 52.5% | SB Win % = 55% | SB Win % = 57.5% | SB Win % = 60% | SB Win % = 62.5% | SB Win % = 65% |
| 2 | 25% | 27.6% | 30.2% | 33.1 | 36 | 39.1 | 42.2 |
| 3 | 12.5% | 14.5% | 16.6% | 19 | 21.6 | 24.4 | 27.5 |
| 4 | 6.2% | 7.6% | 9.2% | 10.9 | 13 | 15.3 | 17.9 |
| 5 | 3.1% | 4% | 5% | 6.3 | 7.8 | 9.5 | 11.6 |
| 6 | 1.6% | 2.1% | 2.8% | 3.6 | 4.7 | 6 | 7.5 |
| 7 | 0.08% | 1.1% | 1.5% | 2.1 | 2.8 | 3.7 | 4.9 |
| Parlay Size | SB Win % = 50% | SB Win % = 52.5% | SB Win % = 55% | SB Win % = 57.5% | SB Win % = 60% | SB Win % = 62.5% | SB Win % = 65% |
| 2 | 300 | 262 | 231 | 202 | 178 | 156 | 137 |
| 3 | 700 | 590 | 502 | 426 | 363 | 310 | 264 |
| 4 | 1513 | 1216 | 987 | 817 | 669 | 554 | 459 |
| 5 | 3126 | 2400 | 1900 | 1487 | 1182 | 953 | 762 |
| 6 | 6150 | 4662 | 3471 | 2678 | 2028 | 1567 | 1233 |
| 7 | 12400 | 8991 | 6567 | 4662 | 3471 | 2603 | 1941 |