RPE Calculator
Standard RPE/RTS chart. Pulls your 1RM from whichever lift you've already saved, or enter one manually.
What does RPE mean in weightlifting?
RPE (Rate of Perceived Exertion) is a 1–10 scale for how hard a set felt, where 10 means you couldn't have done another rep and 8 means you had about 2 reps left in the tank. Because RPE accounts for how you're actually feeling that day, it can be more responsive than a fixed percentage scheme, especially combined with one — this calculator converts an RPE and rep count into an estimated %1RM and working weight, using the same chart popularised by Reactive Training Systems.
Frequently asked questions
What's a good RPE to train at for strength?
Most strength programming sits in the RPE 6–8.5 range for regular training sets, saving RPE 9–10 for occasional peak or test days — training at 10 every session tends to accumulate fatigue faster than it builds strength.
How is RPE different from RIR?
They describe the same thing from opposite directions — RIR (Reps in Reserve) counts how many reps you had left, while RPE rates how hard it felt. RPE 8 and RIR 2 refer to the same effort level.
Does RPE replace percentage-based training?
Not necessarily — many lifters use both together, following a percentage scheme like Progressive Overload most weeks and checking it against RPE to auto-adjust on harder or easier days.
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