5 reps → 1RM
155lb
average estimate
8 reps → 1RM
169lb
10 reps → 1RM
180lb
3 reps → 1RM
146lb
Show the math
Epley (5 reps) = 135 lb × (1 + 5 ÷ 30) = 158 lb
Brzycki (5 reps) = 135 lb × 36 ÷ (37 − 5) = 152 lb
If you lifted 135 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 135 | 135 | 135 |
| 2 reps | 144 | 139 | 141 |
| 3 reps | 148 | 143 | 146 |
| 4 reps | 153 | 147 | 150 |
| 5 reps | 158 | 152 | 155 |
| 6 reps | 162 | 157 | 159 |
| 7 reps | 166 | 162 | 164 |
| 8 reps | 171 | 168 | 169 |
| 9 reps | 176 | 174 | 175 |
| 10 reps | 180 | 180 | 180 |
| 11 reps | 184 | 187 | 186 |
| 12 reps | 189 | 194 | 192 |
If 135 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 128 | 2 |
| 90% | 122 | 4 |
| 85% | 115 | 6 |
| 80% | 108 | 8 |
| 75% | 101 | 10 |
| 70% | 94 | 12 |
| 65% | 88 | 15 |
| 60% | 81 | 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 135 lb for 5 reps?
About 155 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 135 lb for 10 reps?
About 180 lb. Estimates get less precise above 10 reps.