CalculatorVaultCalculators
RPE/RIR Load Calculator
Interactive Vault tool
JR Strength & FitnessUpdated Aug 31, 2026program-design · progression
Problem this solves
Convert a target set (reps at a target RPE or RIR) into a recommended load from a 1RM, with the complete Epley-based derivation shown step by step.
This resource is part of the Vault
Convert a target set (reps at a target RPE or RIR) into a recommended load from a 1RM, with the complete Epley-based derivation shown step by step.