5 reps → 1RM
132lb
average estimate
8 reps → 1RM
144lb
10 reps → 1RM
153lb
3 reps → 1RM
124lb
Show the math
Epley (5 reps) = 115 lb × (1 + 5 ÷ 30) = 134 lb
Brzycki (5 reps) = 115 lb × 36 ÷ (37 − 5) = 129 lb
If you lifted 115 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 115 | 115 | 115 |
| 2 reps | 123 | 118 | 120 |
| 3 reps | 127 | 122 | 124 |
| 4 reps | 130 | 125 | 128 |
| 5 reps | 134 | 129 | 132 |
| 6 reps | 138 | 134 | 136 |
| 7 reps | 142 | 138 | 140 |
| 8 reps | 146 | 143 | 144 |
| 9 reps | 150 | 148 | 149 |
| 10 reps | 153 | 153 | 153 |
| 11 reps | 157 | 159 | 158 |
| 12 reps | 161 | 166 | 163 |
If 115 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 109 | 2 |
| 90% | 104 | 4 |
| 85% | 98 | 6 |
| 80% | 92 | 8 |
| 75% | 86 | 10 |
| 70% | 80 | 12 |
| 65% | 75 | 15 |
| 60% | 69 | 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 115 lb for 5 reps?
About 132 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 115 lb for 10 reps?
About 153 lb. Estimates get less precise above 10 reps.