5 reps → 1RM
327lb
average estimate
8 reps → 1RM
357lb
10 reps → 1RM
380lb
3 reps → 1RM
308lb
Show the math
Epley (5 reps) = 285 lb × (1 + 5 ÷ 30) = 332 lb
Brzycki (5 reps) = 285 lb × 36 ÷ (37 − 5) = 321 lb
If you lifted 285 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 285 | 285 | 285 |
| 2 reps | 304 | 293 | 299 |
| 3 reps | 314 | 302 | 308 |
| 4 reps | 323 | 311 | 317 |
| 5 reps | 332 | 321 | 327 |
| 6 reps | 342 | 331 | 336 |
| 7 reps | 352 | 342 | 347 |
| 8 reps | 361 | 354 | 357 |
| 9 reps | 370 | 366 | 368 |
| 10 reps | 380 | 380 | 380 |
| 11 reps | 390 | 395 | 392 |
| 12 reps | 399 | 410 | 405 |
If 285 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 271 | 2 |
| 90% | 256 | 4 |
| 85% | 242 | 6 |
| 80% | 228 | 8 |
| 75% | 214 | 10 |
| 70% | 200 | 12 |
| 65% | 185 | 15 |
| 60% | 171 | 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 285 lb for 5 reps?
About 327 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 285 lb for 10 reps?
About 380 lb. Estimates get less precise above 10 reps.