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1RM Calculator

Calculate your one-rep max and training percentages

Enter Your Lift

Best results with 1-12 reps

💡 Pro Tips

  • • Most accurate with 3-5 reps (lower reps = more accurate)
  • • Use the Epley formula: 1RM = Weight × (1 + Reps/30)
  • • Always use proper form - partial reps don't count
  • • Test your actual 1RM every 8-12 weeks for accuracy
  • • Different lifts may have different accuracy levels