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RPE/RIR Calculator | Sports Calculator
RPE/RIR Calculator - RPE (Rate of Perceived Exertion) to RIR (Reps in Reserve) conversion
Built by an engineer who chases finish lines and is obsessed with data. Thomas Prommer — technology executive who has worked with Google, Apple, Nike, Adidas, Netflix and other global brands. Also an Ironman finisher, HYROX Pro Division competitor, and marathon runner. These tools combine engineering rigor with real race experience.
RPE/RIR Calculator
RPE (Rate of Perceived Exertion) to RIR (Reps in Reserve) conversion.
Methodology
RPE (Rate of Perceived Exertion) to RIR (Reps in Reserve) conversion. RPE 10 = 0 RIR (failure), RPE 8 = 2 RIR, RPE 7 = 3 RIR. Used for autoregulation.
FAQ
How does this calculator work?
RPE (Rate of Perceived Exertion) to RIR (Reps in Reserve) conversion. RPE 10 = 0 RIR (failure), RPE 8 = 2 RIR, RPE 7 = 3 RIR. Used for autoregulation.
How accurate is this?
Based on established sports science formulas and research.
Who should use this?
Athletes, coaches, and fitness enthusiasts of all levels.
Should I consult a professional?
Yes, especially before major changes to training or for health conditions.
Results are estimates. Consult a professional for personalized guidance.