5 reps → 1RM
258lb
average estimate
8 reps → 1RM
282lb
10 reps → 1RM
300lb
3 reps → 1RM
243lb
Show the math
Epley (5 reps) = 225 lb × (1 + 5 ÷ 30) = 262 lb
Brzycki (5 reps) = 225 lb × 36 ÷ (37 − 5) = 253 lb
If you lifted 225 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 225 | 225 | 225 |
| 2 reps | 240 | 231 | 236 |
| 3 reps | 248 | 238 | 243 |
| 4 reps | 255 | 245 | 250 |
| 5 reps | 262 | 253 | 258 |
| 6 reps | 270 | 261 | 266 |
| 7 reps | 278 | 270 | 274 |
| 8 reps | 285 | 279 | 282 |
| 9 reps | 292 | 289 | 291 |
| 10 reps | 300 | 300 | 300 |
| 11 reps | 308 | 312 | 310 |
| 12 reps | 315 | 324 | 320 |
If 225 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 214 | 2 |
| 90% | 202 | 4 |
| 85% | 191 | 6 |
| 80% | 180 | 8 |
| 75% | 169 | 10 |
| 70% | 158 | 12 |
| 65% | 146 | 15 |
| 60% | 135 | 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 225 lb for 5 reps?
About 258 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 225 lb for 10 reps?
About 300 lb. Estimates get less precise above 10 reps.