5 reps → 1RM
384lb
average estimate
8 reps → 1RM
420lb
10 reps → 1RM
447lb
3 reps → 1RM
362lb
Show the math
Epley (5 reps) = 335 lb × (1 + 5 ÷ 30) = 391 lb
Brzycki (5 reps) = 335 lb × 36 ÷ (37 − 5) = 377 lb
If you lifted 335 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 335 | 335 | 335 |
| 2 reps | 357 | 345 | 351 |
| 3 reps | 369 | 355 | 362 |
| 4 reps | 380 | 365 | 373 |
| 5 reps | 391 | 377 | 384 |
| 6 reps | 402 | 389 | 396 |
| 7 reps | 413 | 402 | 408 |
| 8 reps | 424 | 416 | 420 |
| 9 reps | 436 | 431 | 433 |
| 10 reps | 447 | 447 | 447 |
| 11 reps | 458 | 464 | 461 |
| 12 reps | 469 | 482 | 476 |
If 335 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 318 | 2 |
| 90% | 302 | 4 |
| 85% | 285 | 6 |
| 80% | 268 | 8 |
| 75% | 251 | 10 |
| 70% | 234 | 12 |
| 65% | 218 | 15 |
| 60% | 201 | 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 335 lb for 5 reps?
About 384 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 335 lb for 10 reps?
About 447 lb. Estimates get less precise above 10 reps.