5 reps → 1RM
441lb
average estimate
8 reps → 1RM
483lb
10 reps → 1RM
513lb
3 reps → 1RM
416lb
Show the math
Epley (5 reps) = 385 lb × (1 + 5 ÷ 30) = 449 lb
Brzycki (5 reps) = 385 lb × 36 ÷ (37 − 5) = 433 lb
If you lifted 385 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 385 | 385 | 385 |
| 2 reps | 411 | 396 | 403 |
| 3 reps | 424 | 408 | 416 |
| 4 reps | 436 | 420 | 428 |
| 5 reps | 449 | 433 | 441 |
| 6 reps | 462 | 447 | 455 |
| 7 reps | 475 | 462 | 468 |
| 8 reps | 488 | 478 | 483 |
| 9 reps | 500 | 495 | 498 |
| 10 reps | 513 | 513 | 513 |
| 11 reps | 526 | 533 | 530 |
| 12 reps | 539 | 554 | 547 |
If 385 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 366 | 2 |
| 90% | 346 | 4 |
| 85% | 327 | 6 |
| 80% | 308 | 8 |
| 75% | 289 | 10 |
| 70% | 270 | 12 |
| 65% | 250 | 15 |
| 60% | 231 | 20 |
How to use it
- Enter your numbers. Switch between US and metric units at any time.
- Results update as you type, and the formula is shown so you can check it.
- Copy the link, save the plan on this device, or print it for your next appointment.
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These are estimates, not a diagnosis. A clinician can account for your health history and medicines.
Other weights
Common questions
What is my 1RM if I lift 385 lb for 5 reps?
About 441 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 385 lb for 10 reps?
About 513 lb. Estimates get less precise above 10 reps.