FormaGet FormaRPE 8 means about two reps in reserve.
On the resistance-training RIR-based scale, an RPE 8 set ends when you believe about two more complete repetitions were available with the intended technique.
Published and last reviewed September 14, 2026 · 6-minute read
RPE 8 inside the scale
| Rating | RIR anchor | Interpretation |
|---|---|---|
| RPE 10 | 0 RIR | No additional complete repetition available. |
| RPE 9 | 1 RIR | About one repetition available. |
| RPE 8 | 2 RIR | About two repetitions available. |
| RPE 7 | 3 RIR | About three repetitions available. |
Two RPE 8 examples
Bench press
You complete eight repetitions and estimate that ten were possible. The set is about 2 RIR, or RPE 8.
Squat
You complete five repetitions and estimate that seven were possible. This can also be RPE 8 despite a different exercise and repetition count.
This is why RPE 8 is not one fixed load percentage. The rating changes with the repetition target, exercise, daily performance, and individual repetition capacity.
How to use RPE 8
Know the target
Read RPE 8 as an intended effort, not as a command to use a particular percentage.
Perform consistently
Keep range and technique comparable enough for the rating to retain meaning.
Rate the completed set
Ask whether about two more complete repetitions were available.
Review the history
Use repeated sets and sessions instead of overreacting to one subjective rating.
Accuracy boundary
The RIR anchor is subjective. A review of 12 studies found imperfect predictions overall, with accuracy generally improving closer to failure and in lower-repetition, heavier-load conditions. Familiarity can help make the language more useful, but it does not turn RPE 8 into a direct measurement.
Technique still decides when a set ends
If pain, unsafe setup, or meaningful technique breakdown occurs, stop the set. A planned RPE is not a reason to force additional repetitions.
Frequently asked questions
What does RPE 8 mean in lifting?
On the resistance-training RIR-based scale, RPE 8 means you estimate that about two additional complete repetitions were available before task failure.
Is RPE 8 the same as 80% of 1RM?
No. RPE 8 is a perceived-effort rating, while 80% of 1RM is a relative load. Different repetition counts and exercises can reach RPE 8 at different percentages of 1RM.
Can RPE 8 be inaccurate?
Yes. RPE 8 depends on an estimated 2 RIR, and people do not predict repetitions to failure perfectly. Treat the number as useful context rather than a measured fact.
Should every working set be RPE 8?
No universal RPE fits every set. The useful target depends on the exercise, goal, phase, fatigue cost, technique, safety, and the rest of the program.
Sources
Journal of Strength and Conditioning Research, 2016. PMID: 26049792.
Strength and Conditioning Journal, 2016. PMID: 27531969.
Scoping review and exploratory meta-analysis, 2022. PMID: 34542869.
Continue through the RIR library
Log RPE 8 as effort, not just a label.
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