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One Rep Max (1RM) Calculator

Enter the weight you lifted and the number of reps; using the Epley formula we estimate your one-rep max (1RM) and your 90%, 80% and 70% training loads.

Estimated with the Epley formula: 1RM = weight × (1 + reps/30). Actual max varies by individual.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

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