Estimate your one-rep max from reps and weight, plus 60-90% training percentages. Free 1RM calculator.
This calculator averages the Epley and Brzycki formulas to estimate your one-rep max, then gives you common training percentages (60%, 70%, 80%, 90%). Use these to program strength work: heavy singles and doubles near 90%, hypertrophy work around 70–80%. Estimates are most accurate at five reps or fewer.