5 reps → 1RM
166lb
average estimate
8 reps → 1RM
182lb
10 reps → 1RM
193lb
3 reps → 1RM
157lb
Show the math
Epley (5 reps) = 145 lb × (1 + 5 ÷ 30) = 169 lb
Brzycki (5 reps) = 145 lb × 36 ÷ (37 − 5) = 163 lb
If you lifted 145 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 145 | 145 | 145 |
| 2 reps | 155 | 149 | 152 |
| 3 reps | 160 | 154 | 157 |
| 4 reps | 164 | 158 | 161 |
| 5 reps | 169 | 163 | 166 |
| 6 reps | 174 | 168 | 171 |
| 7 reps | 179 | 174 | 176 |
| 8 reps | 184 | 180 | 182 |
| 9 reps | 188 | 186 | 187 |
| 10 reps | 193 | 193 | 193 |
| 11 reps | 198 | 201 | 199 |
| 12 reps | 203 | 209 | 206 |
If 145 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 138 | 2 |
| 90% | 130 | 4 |
| 85% | 123 | 6 |
| 80% | 116 | 8 |
| 75% | 109 | 10 |
| 70% | 102 | 12 |
| 65% | 94 | 15 |
| 60% | 87 | 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.
Want a clinician to look at these numbers?We know licensed clinicians in every state. If you ask, one can reach out to you. Get matched
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 145 lb for 5 reps?
About 166 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 145 lb for 10 reps?
About 193 lb. Estimates get less precise above 10 reps.