1RM Calculator1RM Calculator Name: Gender: Male Female Other Date: Weight Lifted: Unit: Kilograms (kg) Pounds (lbs) Repetitions (Reps): For best accuracy, use 1-15 repetitions. Select Formula: Brzycki (Default)EpleyLombardiMayhew et al.McGlothinO’Conner et al.Wathan Calculate 1RM Your Estimated 1RM:0 kg Download Report