What is RPE in weightlifting?

RPE stands for Rate of Perceived Exertion. In powerlifting, the 1–10 scale (popularized by Mike Tuchscherer) describes how many reps you had left in reserve: RPE 10 means no reps left (maximal effort), RPE 9 means one rep left, RPE 8 means two reps left, and so on. Half-point increments (e.g. 8.5) are common.

What is the Tuchscherer RPE chart?

The Tuchscherer RPE chart is a lookup table developed by Mike Tuchscherer (Reactive Training Systems) that maps RPE and rep count to a percentage of 1RM. For example, 1 rep at RPE 10 = 100%, 1 rep at RPE 9 = ~96%, 3 reps at RPE 8 = ~90%. It is the most widely used RPE-to-percentage reference in powerlifting.

What is Reps in Reserve (RIR)?

RIR and RPE are two ways to express the same concept. RPE 10 = 0 RIR, RPE 9 = 1 RIR, RPE 8 = 2 RIR, RPE 7 = 3 RIR, etc. This calculator uses the RPE scale; subtract your RPE from 10 to get RIR.

How accurate is the RPE chart?

The chart is an estimate — individual response varies based on training age, lift, fatigue, and daily readiness. It is most accurate for experienced lifters who can self-assess RPE precisely. Beginners often over- or under-estimate RPE by 1–2 points, so treat the percentages as guidelines rather than exact prescriptions.

Why does the chart only go down to RPE 6?

Below RPE 6 the effort is so submaximal that the percentage-to-performance relationship becomes unreliable. Most auto-regulation programming uses RPE 6–10 as the meaningful working range.

Can I use this for any lift?

Yes. The Tuchscherer chart is lift-agnostic and is commonly applied to squat, bench press, deadlift, and overhead press. Individual RPE accuracy may differ by lift (most lifters self-assess the deadlift less precisely), but the chart values are the same.

RPE to Percentage of 1RM Calculator

Convert RPE (1–10) and reps performed to an estimated percentage of your 1RM, or reverse-lookup RPE from a known percentage.

Inputs

Direction

RPE (6 – 10, half-steps allowed)

Reps Performed

Tuchscherer RPE Chart — % of 1RM

Highlighted cell = your current lookup

RPE \ Reps

Summary

Convert RPE (1–10) and reps performed to an estimated percentage of your 1RM, or reverse-lookup RPE from a known percentage.

How it works

Select the direction: RPE + Reps to %1RM, or %1RM + Reps to RPE.
For RPE-to-%1RM: enter your RPE (6–10 in 0.5 steps) and the number of reps performed (1–12).
For %1RM-to-RPE: enter your percentage (50–100%) and the rep count.
The calculator looks up the value in the Tuchscherer RPE chart and returns the result instantly.
Use the result to set training loads (e.g. "I want to work at RPE 8 for 3 reps — what weight?").
The full reference table is shown below the calculator for quick cross-checking.

Use cases

Determine what percentage of your 1RM to load for a given RPE target.
Estimate how hard a set was after recording the reps and RPE in a training log.
Program auto-regulation blocks: assign RPE targets instead of fixed percentages.
Compare effort levels across different rep ranges in a training cycle.
Cross-check your perceived exertion against established powerlifting standards.
Teach newer lifters how RPE maps to intensity percentages.

Frequently Asked Questions

Last updated: 2026-09-22 · Reviewed by Nham Vu