Calculate your one-rep max for any lift
Epley Formula: 1RM = weight × (1 + reps ÷ 30)
Enter weight and reps to calculate your one-rep max
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 based on submaximal lifts. The formulas work best with reps between 1-10. Results are estimates and may vary based on exercise type and individual factors.