One-Rep Max (1RM) Calculator

Estimate your max lift from weight × reps (Epley, Brzycki & more)

Weight lifted

Reps completed (1–12)

Average estimate

Formula	Estimated 1RM

Best accuracy with 2–6 reps. Do not attempt true 1RM without a spotter.

Health

one_rep_max_calculator

Published

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Updated

2026-05-31 22:57:28

Author

Taylor Bennett