5 reps → 1RM
97lb
average estimate
8 reps → 1RM
107lb
10 reps → 1RM
113lb
3 reps → 1RM
92lb
Show the math
Epley (5 reps) = 85 lb × (1 + 5 ÷ 30) = 99 lb
Brzycki (5 reps) = 85 lb × 36 ÷ (37 − 5) = 96 lb
If you lifted 85 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 85 | 85 | 85 |
| 2 reps | 91 | 87 | 89 |
| 3 reps | 94 | 90 | 92 |
| 4 reps | 96 | 93 | 95 |
| 5 reps | 99 | 96 | 97 |
| 6 reps | 102 | 99 | 100 |
| 7 reps | 105 | 102 | 103 |
| 8 reps | 108 | 106 | 107 |
| 9 reps | 110 | 109 | 110 |
| 10 reps | 113 | 113 | 113 |
| 11 reps | 116 | 118 | 117 |
| 12 reps | 119 | 122 | 121 |
If 85 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 81 | 2 |
| 90% | 76 | 4 |
| 85% | 72 | 6 |
| 80% | 68 | 8 |
| 75% | 64 | 10 |
| 70% | 60 | 12 |
| 65% | 55 | 15 |
| 60% | 51 | 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 85 lb for 5 reps?
About 97 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 85 lb for 10 reps?
About 113 lb. Estimates get less precise above 10 reps.