One Rep Max (1RM) Calculator
Estimate your maximum lifting strength from a recent set.
Enter Your Lift Details
For best results, use a repetition count between 2 and 8. The formula is less accurate for more than 12 reps.
One Rep Max (1RM) Report
Date Generated:
Estimated One-Rep Max (1RM)
Based on the Brzycki formula for best accuracy.
Training Percentages
| Percentage of 1RM | Estimated Weight | Approx. Reps |
|---|
This is an estimate. Your actual 1RM can vary based on fatigue, experience, and the specific exercise. Always use a spotter when attempting a new maximum lift.