Tools
RPE Calculator
Enter a weight, the reps you did, and how hard it felt on the RPE scale to estimate your one-rep max, then plan your attempts and warmups.
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Enter a recent set to plan your attempts.
Compare against
Reading the RPE scale
RPE is reps in reserve inverted: RPE 10 is a true max with nothing left, RPE 9 leaves one rep, RPE 8 leaves two. The estimate uses the Reactive Training Systems chart to map your reps and RPE to a percent of your one-rep max.