RPE to Weight Calculator
Convert Rate of Perceived Exertion (RPE) and target reps to a working weight based on your estimated 1RM.
Working Weight
255 lbs
Working Weight vs Estimated 1RM
How RPE Translates to Weight
RPE (Rate of Perceived Exertion) uses a 1-10 scale where 10 means maximum effort (no reps left) and lower numbers mean more reps in reserve.
Formula
Reps in Reserve = 10 - RPE
Effective Max Reps = Target Reps + Reps in Reserve
% 1RM = 100 / (1 + Effective Reps / 30)
This reverse-engineers the Epley formula to find the appropriate percentage of 1RM.
Example
RPE 8 at 5 reps means you could do 7 total reps (2 in reserve), which corresponds to roughly 81% of 1RM.
Example Calculation
Deadlift 1RM is 315 lbs. Target: 5 reps at RPE 8.
- 01Reps in reserve = 10 - 8 = 2
- 02Effective reps = 5 + 2 = 7
- 03% 1RM = 100 / (1 + 7/30) = 100 / 1.233 = 81.1%
- 04Working weight = 315 * 0.811 = 255.4, rounded to 255 lbs
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