The following table is a quick and dirty way to find your one rep max in any one of the three powerlifts. I have found it to be accurate to + - five pounds. To find your one rep max in a particular lift, multiply the constant that corresponds with the number of repetitions of your best set, by the weight of your best set.
Example: 300 lbs. for five repitions on the bench 300 x 1.15 = 345 lbs. (projected 1 rep max.)| Repetitions | Squat | Benchpress | Deadlift |
| 1 | 1.0 | 1.0 | 1.0 |
| 2 | 1.0475 | 1.035 | 1.065 |
| 3 | 1.13 | 1.08 | 1.13 |
| 4 | 1.1575 | 1.115 | 1.147 |
| 5 | 1.2 | 1.15 | 1.164 |
| 6 | 1.242 | 1.18 | 1.181 |
| 7 | 1.284 | 1.22 | 1.198 |
| 8 | 1.326 | 1.255 | 1.232 |
| 9 | 1.368 | 1.29 | 1.232 |
| 10 | 1.41 | 1.325 | 1.24 |
