RPE Calculator
Estimate 1RM and training loads from RPE
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RPE 10 = no reps left, RPE 8 = 2 reps in reserve
RPE Calculator
RPE-based training adjusts the weight to how hard a set actually feels instead of a fixed percentage. Enter the weight you lifted, the reps and the RPE of that set, and this calculator uses the standard RPE chart to estimate your 1RM and suggest working loads for common rep targets. RPE 10 means no reps left in the tank; RPE 8 means roughly two in reserve. It is the basis of modern autoregulated programs and pairs well with a 1RM percentage plan.
Based on the standard RPE/RIR chart. RPE (rate of perceived exertion) rates how hard a set was: RPE 10 is a true max, RPE 8 means you could have done about 2 more reps. It is a more flexible alternative to fixed percentages for autoregulated training.
Frequently Asked Questions
- What is an RPE calculator used for?
- An RPE calculator converts a set's weight, reps and Rating of Perceived Exertion into an estimated one-rep max and suggested working loads. It lets you autoregulate training by basing weights on how hard a set actually felt rather than fixed percentages.
- How does the RPE and RIR scale work?
- RPE rates effort from 1 to 10, where 10 means no reps left in reserve. It maps directly to Reps in Reserve: an RPE of 8 means about 2 reps left, and 9 means about 1 rep left, which the chart uses to estimate your max.
- What RPE should I train at?
- Most strength work is programmed around RPE 7 to 9, leaving roughly 1 to 3 reps in reserve, to drive adaptation while managing fatigue. Reserve true RPE 10 sets for testing, since training to absolute failure repeatedly can hinder recovery.