5 reps → 1RM
372lb
average estimate
8 reps → 1RM
408lb
10 reps → 1RM
433lb
3 reps → 1RM
351lb
Show the math
Epley (5 reps) = 325 lb × (1 + 5 ÷ 30) = 379 lb
Brzycki (5 reps) = 325 lb × 36 ÷ (37 − 5) = 366 lb
If you lifted 325 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 325 | 325 | 325 |
| 2 reps | 347 | 334 | 340 |
| 3 reps | 358 | 344 | 351 |
| 4 reps | 368 | 355 | 361 |
| 5 reps | 379 | 366 | 372 |
| 6 reps | 390 | 377 | 384 |
| 7 reps | 401 | 390 | 395 |
| 8 reps | 412 | 403 | 408 |
| 9 reps | 422 | 418 | 420 |
| 10 reps | 433 | 433 | 433 |
| 11 reps | 444 | 450 | 447 |
| 12 reps | 455 | 468 | 462 |
If 325 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 309 | 2 |
| 90% | 292 | 4 |
| 85% | 276 | 6 |
| 80% | 260 | 8 |
| 75% | 244 | 10 |
| 70% | 228 | 12 |
| 65% | 211 | 15 |
| 60% | 195 | 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 325 lb for 5 reps?
About 372 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 325 lb for 10 reps?
About 433 lb. Estimates get less precise above 10 reps.