RPE to Percentage of 1RM Calculator
Map RPE 6-10 across 1-12 reps to % of 1RM (Tuchscherer / Reactive Training Systems table).
Result
% of 1RM
81.1%
Enter 1RM to compute weight.
- RPE8
- Reps5
- % 1RM81.1%
- 1RM (input)—
- Target weight—
Step-by-step
- Look up RPE 8 × 5 reps in Tuchscherer table.
- Result: 81.1% of 1RM.
- (no 1RM provided)
How to use this calculator
- Pick the RPE you hit on the set.
- Enter reps performed.
- Optionally enter known 1RM to compute the corresponding weight.
- Use to calibrate intensity day-to-day.
About this calculator
RPE (Rate of Perceived Exertion) on the Mike Tuchscherer 6-10 scale: 10 = absolute max, 9 = 1 rep in reserve (RIR), 8 = 2 RIR, 7 = 3 RIR. Combined with rep count, it maps to a % of 1RM. The RTS table (Reactive Training Systems) is the standard reference: a set of 5 at RPE 8 = ~81%; a set of 3 at RPE 9 = ~89%. Once you understand the table, RPE-based programming lets you adjust weight day-to-day without rigidly chasing prescribed percentages.
Frequently asked
For experienced lifters: ±0.5 RPE = ±2-3% of 1RM. Beginners under-rate effort consistently — most novice "RPE 7s" are actually RPE 9.
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