One Rep Max Calculator Calculate your One Max Rep instantly. Row edge-slant Shape Decorative svg added to top Row edge-slant Shape Decorative svg added to bottom What's Your Score? Fill out your information for an instant calculation of your One Rep Max. One Rep Max CalculatorWeight LiftedUnits- Select -lbskgsReps PerformedYour One Rep Max is Percentage of 1RM Lift Weight Repetitions of 1RM 100% 1 95% 2 90% 4 85% 6 80% 8 75% 10 70% 12 65% 16 60% 20 55% 24 50% 30 100 Percentile95 Percentile90 Percentile85 Percentile80 Percentile75 Percentile70 Percentile65 Percentile60 Percentile55 Percentile50 PercentileSubmit Form