About 1 Rep Max (1RM) Calculator
Calculate your theoretical maximum lifting weight using Brzycki and Epley equations.. Designed for accurate, instantaneous calculations with zero wait time.
Formula
Brzycki: 1RM = Weight / [1.0278 - (0.0278 × Reps)]
Example Calculation
Bench pressing 80 kg for 8 reps yields an estimated 1 Rep Max of 99.3 kg.
How to Use
- Enter your values into the form fields above.
- The calculation updates immediately in real time.
- Inspect the main summary and secondary breakdowns below.