1RM Calculator
Calculate your one-rep maximum (1RM) for any lift without maximal testing. Get percentages for your training program based on your estimated 1RM.
Calculate Your 1RM
Enter your lift details to calculate your estimated one-rep maximum.
Results
Your estimated one-rep maximum and training percentages.
Fill in the weight and repetitions, then click Calculate to see your estimated 1RM.
Understanding One-Rep Maximum (1RM)
Benefits of Knowing Your 1RM
Understanding your one-rep maximum provides several advantages for your training:
- Allows for precise loading based on percentages in your training program
- Provides a clear benchmark to track strength progress over time
- Helps prevent undertraining or overtraining by working at appropriate intensities
- Enables more effective periodization by targeting specific adaptations
- Builds confidence by quantifying your strength capabilities