RPE Calculator

Scientifically validated calculators for strength training, powerlifting, running, cycling, and cardio. Optimize your training with Rating of Perceived Exertion.

Based on peer-reviewed research with 0.80-0.90 correlation to physiological markers

🎯 Accurate

Based on validated RPE scales with strong correlations (r=0.80-0.90) to heart rate, lactate, and 1RM percentages.

🔬 Scientific

Formulas derived from peer-reviewed research including Borg Scale, Helms RIR method, and Karvonen formula.

💪 Comprehensive

Covers all training modalities: strength, powerlifting, running, cycling, and general cardio exercise.

What is RPE?

Rating of Perceived Exertion measures exercise intensity based on how hard you feel your body is working.

Strength Training (1-10 with RIR)

  • RPE 10:Maximum effort - 0 reps in reserve (RIR)
  • RPE 9:Could do 1 more rep
  • RPE 8:Could do 2 more reps
  • RPE 7:Could do 3 more reps

Cardio Training (0-10 Scale)

  • RPE 0-2:Very light - easy conversation
  • RPE 3-4:Light - comfortable pace
  • RPE 5-6:Moderate - talking requires effort
  • RPE 7-8:Vigorous - conversation difficult
  • RPE 9-10:Near maximal to maximal effort