5 reps → 1RM
281lb
average estimate
8 reps → 1RM
307lb
10 reps → 1RM
327lb
3 reps → 1RM
264lb
Show the math
Epley (5 reps) = 245 lb × (1 + 5 ÷ 30) = 286 lb
Brzycki (5 reps) = 245 lb × 36 ÷ (37 − 5) = 276 lb
If you lifted 245 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 245 | 245 | 245 |
| 2 reps | 261 | 252 | 257 |
| 3 reps | 270 | 259 | 264 |
| 4 reps | 278 | 267 | 272 |
| 5 reps | 286 | 276 | 281 |
| 6 reps | 294 | 285 | 289 |
| 7 reps | 302 | 294 | 298 |
| 8 reps | 310 | 304 | 307 |
| 9 reps | 318 | 315 | 317 |
| 10 reps | 327 | 327 | 327 |
| 11 reps | 335 | 339 | 337 |
| 12 reps | 343 | 353 | 348 |
If 245 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 233 | 2 |
| 90% | 220 | 4 |
| 85% | 208 | 6 |
| 80% | 196 | 8 |
| 75% | 184 | 10 |
| 70% | 172 | 12 |
| 65% | 159 | 15 |
| 60% | 147 | 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 245 lb for 5 reps?
About 281 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 245 lb for 10 reps?
About 327 lb. Estimates get less precise above 10 reps.