RPE-Velocity Converter
Map your personal RPE to last-rep velocity. Enter 2–3 data points and get a complete conversion chart for any exercise.
Your Data Points
Bench Press — RPE to Velocity Chart
Bench Press
Screenshot this card for gym reference
RPE, RIR & Velocity
Rate of Perceived Exertion (RPE) and Reps in Reserve (RIR) describe how hard a set felt. RPE 10 means you left nothing in the tank — 0 reps left. RPE 8 means you had roughly 2 more reps available. These are useful, but subjective.
Bar velocity makes RPE objective. Research consistently shows that as a set approaches failure, bar speed slows down in a predictable way. Your last rep at RPE 9 will always move slower than your last rep at RPE 7 — the exact velocity is personal to you, your exercise, and your fiber makeup.
By entering 2–3 known (RPE, velocity) pairs from your own training, this converter fits a linear model to your personal data and predicts the full RPE-to-velocity curve. Use the generated chart during training: when your device reads a certain velocity, you instantly know your RPE without guessing.