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Calculate your one-rep max using multiple proven strength formulas. Review the result before reusing it in another workflow.
5 reps
Max Strength
1-3 reps @ 90-100%
Strength
4-6 reps @ 80-90%
Hypertrophy
8-12 reps @ 65-80%
Endurance
15-20 reps @ 50-65%
Estimated 1RM (Average)
115.6
kg
Most widely used formula
Accurate for lower rep ranges
Good for moderate reps
Research-based formula
Conservative estimate
| %1RM | Weight | ~Reps |
|---|---|---|
| 100% | 115.6 kg | 1 |
| 95% | 109.8 kg | 2 |
| 90% | 104 kg | 4 |
| 85% | 98.3 kg | 6 |
| 80% | 92.5 kg | 8 |
| 75% | 86.7 kg | 10 |
| 70% | 80.9 kg | 12 |
| 65% | 75.1 kg | 15 |
| 60% | 69.4 kg | 18 |
| 55% | 63.6 kg | 20 |
| 50% | 57.8 kg | 25 |