One-Rep Max Calculator
Calculate your one-repetition maximum for weight training
Lift Information
reps
Your One-Rep Max Results
Based on your lift and selected formula
116.7 lbs
Brzycki Formula
Estimated One-Repetition Maximum
Results by Different Formulas
Training Weight Chart
| Reps | % of 1RM | Training Weight |
|---|---|---|
| 1 | 100% | 116.7 lbs |
| 2 | 95% | 110.9 lbs |
| 3 | 90% | 105.0 lbs |
| 4 | 88% | 102.7 lbs |
| 5 | 85% | 99.2 lbs |
| 6 | 83% | 96.9 lbs |
| 8 | 80% | 93.4 lbs |
| 10 | 75% | 87.5 lbs |
| 12 | 70% | 81.7 lbs |
About One-Rep Max (1RM)
One-Rep Max (1RM) is the maximum amount of weight you can lift for one repetition of a given exercise. It's a fundamental measure of strength and is used to design effective training programs.
Training Percentages Guide
| Training Goal | % of 1RM | Rep Range |
|---|---|---|
| Maximal Strength | 90-100% | 1-3 reps |
| Strength | 85-90% | 3-5 reps |
| Hypertrophy | 70-85% | 6-12 reps |
| Muscular Endurance | 60-70% | 12-20 reps |
Safety Considerations
- Always use proper form and technique
- Have a spotter when attempting heavy lifts
- Warm up properly before testing 1RM
- Don't test 1RM too frequently (every 4-6 weeks maximum)