5 reps → 1RM
74lb
average estimate
8 reps → 1RM
82lb
10 reps → 1RM
87lb
3 reps → 1RM
70lb
Show the math
Epley (5 reps) = 65 lb × (1 + 5 ÷ 30) = 76 lb
Brzycki (5 reps) = 65 lb × 36 ÷ (37 − 5) = 73 lb
If you lifted 65 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 65 | 65 | 65 |
| 2 reps | 69 | 67 | 68 |
| 3 reps | 72 | 69 | 70 |
| 4 reps | 74 | 71 | 72 |
| 5 reps | 76 | 73 | 74 |
| 6 reps | 78 | 75 | 77 |
| 7 reps | 80 | 78 | 79 |
| 8 reps | 82 | 81 | 82 |
| 9 reps | 84 | 84 | 84 |
| 10 reps | 87 | 87 | 87 |
| 11 reps | 89 | 90 | 89 |
| 12 reps | 91 | 94 | 92 |
If 65 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 62 | 2 |
| 90% | 58 | 4 |
| 85% | 55 | 6 |
| 80% | 52 | 8 |
| 75% | 49 | 10 |
| 70% | 46 | 12 |
| 65% | 42 | 15 |
| 60% | 39 | 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 65 lb for 5 reps?
About 74 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 65 lb for 10 reps?
About 87 lb. Estimates get less precise above 10 reps.