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Estimated 1-Rep Max
kg / lbs (Units Consistent)
Epley Formula
117
Brzycki Formula
113
Accuracy of 1RM estimators decreases significantly if reps performed are > 10. For maximum accuracy, use a sub-maximal load that produces failure in the 3–6 rep range.
Verified
Last Review: 2026
Last Comprehensive Review: 2026
