Calculate your maximum single-rep lift using multiple proven formulas for strength training.
Enter between 2-30 reps for best accuracy
Your One Rep Max (1RM) is the maximum weight you can lift for a single repetition. This calculator uses multiple proven formulas to estimate your 1RM.
Training Tips: Use 85-95% for strength, 70-85% for hypertrophy, and 50-70% for endurance training.
Safety: Always warm up properly and consider using a spotter when attempting heavy lifts.