RM

RM Calculator

Calculate Working Weight for Your Sets

Free scientific calculator to determine the weight you should use when performing sets of N reps, based on your one-rep max (1RM) and RPE (Rate of Perceived Exertion).

Why Use RPE-Based Training

Our RM calculator combines traditional percentage-based training with RPE to provide more accurate and personalized training weights. This approach accounts for daily variations in strength and fatigue, leading to more effective training.

  • Autoregulation Based on Daily Readiness
  • Fatigue Management
  • Progressive Overload Optimization
  • Injury Prevention
  • Long-term Sustainable Progress

About RPE

RPE (Rate of Perceived Exertion) is a scale used to measure the intensity of your training. It helps you autoregulate your training based on your daily readiness and fatigue levels.

RPE Scale:

  • RPE 10: Maximum effort, no reps left
  • RPE 9: 1 rep left in reserve
  • RPE 8: 2 reps left in reserve
  • RPE 7: 3 reps left in reserve
  • RPE 6: 4-6 reps left in reserve

Frequently Asked Questions

What is RPE and why is it important?

RPE (Rate of Perceived Exertion) is a subjective measure of how hard an exercise feels. It's important because it allows you to adjust your training based on your daily readiness and fatigue levels.

How do I determine my RPE?

RPE is based on how many reps you feel you could still do after completing a set. For example, if you feel you could do 2 more reps, that would be an RPE 8.

Why use both percentages and RPE?

Combining percentage-based training with RPE provides structure while allowing flexibility. Percentages give you a starting point, while RPE helps you fine-tune based on how you feel that day.

How often should I adjust my training weights?

You should recalculate your training weights whenever you test a new 1RM or if your RPE consistently feels too high or too low for the prescribed weights.

Is this calculator suitable for beginners?

Yes, but beginners should start with conservative RPE ratings (6-8) while learning to gauge their effort levels accurately.