One Rep Max (1RM) Calculator

Estimate your one-repetition maximum for any lift to gauge your strength and plan your training.

Lift Details

1RM Formula (Brzycki):

1RM = Weight / (1.0278 - 0.0278 × Reps)

Training Tip:

For best accuracy, use a rep range between 2 and 10. Always prioritize proper form and safety.

Your 1RM Results

Enter your lift details to estimate your 1RM

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