5 reps → 1RM
304lb
average estimate
8 reps → 1RM
332lb
10 reps → 1RM
353lb
3 reps → 1RM
286lb
Show the math
Epley (5 reps) = 265 lb × (1 + 5 ÷ 30) = 309 lb
Brzycki (5 reps) = 265 lb × 36 ÷ (37 − 5) = 298 lb
If you lifted 265 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 265 | 265 | 265 |
| 2 reps | 283 | 273 | 278 |
| 3 reps | 292 | 281 | 286 |
| 4 reps | 300 | 289 | 295 |
| 5 reps | 309 | 298 | 304 |
| 6 reps | 318 | 308 | 313 |
| 7 reps | 327 | 318 | 322 |
| 8 reps | 336 | 329 | 332 |
| 9 reps | 344 | 341 | 343 |
| 10 reps | 353 | 353 | 353 |
| 11 reps | 362 | 367 | 365 |
| 12 reps | 371 | 382 | 376 |
If 265 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 252 | 2 |
| 90% | 238 | 4 |
| 85% | 225 | 6 |
| 80% | 212 | 8 |
| 75% | 199 | 10 |
| 70% | 186 | 12 |
| 65% | 172 | 15 |
| 60% | 159 | 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 265 lb for 5 reps?
About 304 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 265 lb for 10 reps?
About 353 lb. Estimates get less precise above 10 reps.