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One Rep Max (1RM) Calculator â Strength & Percentage Table
Calculate your maximum lift for Bench Press, Squat, or Deadlift, along with a full workout training percentage chart.
One Rep Max (1RM) Calculator â Strength & Percentage Table
Calculate your maximum lift for Bench Press, Squat, or Deadlift, along with a full workout training percentage chart.
Calculated Results
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Enter your values on the left and click Calculate to view instant results.
How to Use This 1RM Calculator
- Enter the weight you lifted (kg or lbs).
- Enter the clean repetitions completed (1 to 12 reps for highest accuracy).
- Click Calculate 1RM to generate your 1RM and percentage matrix.
Mathematical Formula & Methodology
Uses the proven Brzycki Formula:
1RM = Weight ÷ (1.0278 – (0.0278 × Repetitions))
Frequently Asked Questions
Sets of 3 to 6 repetitions yield the most accurate estimates. Estimates beyond 10 reps are less reliable.