5 reps → 1RM
86lb
average estimate
8 reps → 1RM
94lb
10 reps → 1RM
100lb
3 reps → 1RM
81lb
Show the math
Epley (5 reps) = 75 lb × (1 + 5 ÷ 30) = 88 lb
Brzycki (5 reps) = 75 lb × 36 ÷ (37 − 5) = 84 lb
If you lifted 75 lb for…
| Reps | Epley | Brzycki | Average 1RM |
|---|---|---|---|
| 1 rep | 75 | 75 | 75 |
| 2 reps | 80 | 77 | 79 |
| 3 reps | 82 | 79 | 81 |
| 4 reps | 85 | 82 | 83 |
| 5 reps | 88 | 84 | 86 |
| 6 reps | 90 | 87 | 89 |
| 7 reps | 92 | 90 | 91 |
| 8 reps | 95 | 93 | 94 |
| 9 reps | 98 | 96 | 97 |
| 10 reps | 100 | 100 | 100 |
| 11 reps | 102 | 104 | 103 |
| 12 reps | 105 | 108 | 106 |
If 75 lb is your one rep max
| % of 1RM | Load (lb) | About this many reps |
|---|---|---|
| 95% | 71 | 2 |
| 90% | 68 | 4 |
| 85% | 64 | 6 |
| 80% | 60 | 8 |
| 75% | 56 | 10 |
| 70% | 52 | 12 |
| 65% | 49 | 15 |
| 60% | 45 | 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 75 lb for 5 reps?
About 86 lb, averaging the Epley and Brzycki formulas.
What is my 1RM if I lift 75 lb for 10 reps?
About 100 lb. Estimates get less precise above 10 reps.