RPE Scale Explained: What RPE 6, 7, 8, 9, and 10 Actually Mean
Bikash Roy
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Full bio →The RPE Scale in Powerlifting
The RPE (Rate of Perceived Exertion) scale in powerlifting is a 1–10 scale measuring how close a set was to your maximum effort — specifically, how many more reps you could have completed.
This is different from general exercise RPE scales (like the Borg scale) which measure cardiovascular effort. Powerlifting RPE measures proximity to failure on a given set.
The RPE Calculator uses the Tuchscherer RTS chart to convert RPE + reps completed to an estimated 1RM. Understanding what each RPE level actually feels like is the prerequisite for using that calculator accurately.
The Core Relationship: RPE = 10 − Reps in Reserve
The simplest way to understand the scale:
| RPE | Reps Left (RIR) | Meaning |
|---|---|---|
| 10 | 0 | Absolute maximum — could not have done another rep |
| 9.5 | 0–1 | Might have gotten one more, might not |
| 9 | 1 | Definitely could have done exactly one more |
| 8.5 | 1–2 | Could do one more; two would be a stretch |
| 8 | 2 | Two more reps were definitely possible |
| 7.5 | 2–3 | Two more for sure; third rep questionable |
| 7 | 3 | Three more reps clearly possible |
| 6 | 4 | Working, but clearly had four more in the tank |
| 5 | 5 | Warm-up range — half of capacity remaining |
In practice, most training programs use RPE 6–10. Below RPE 6, the load is so light that tracking RPE provides little useful information.
What Each Level Feels Like in Practice
RPE 6 — Four Reps in Reserve
Bar moves fast. No real effort required to keep moving. This is the start of a warmup-to-training range — used for technique practice and submaximal volume early in a program.
On a 5-rep set at RPE 6, you finish your fifth rep and think “I’m working but I could easily do this four more times.” There’s no hesitation or slowdown on the last rep.
When to use RPE 6: First sessions in a new training block; deload weeks; technique-focused work; high-rep accessories.
RPE 7 — Three Reps in Reserve
Working sets begin to feel like actual work. Some concentration required. The last rep of the set requires attention but remains controlled and fast.
On a 3-rep set at RPE 7, each rep is crisp. After the third rep, you could definitely start a fourth, fifth, and probably sixth without struggling.
When to use RPE 7: Accumulation phase volume work; early competition prep block; introducing a new movement pattern at training weight.
RPE 8 — Two Reps in Reserve
This is where most serious training lives. The set is challenging. Focus is required on every rep. Bar speed may slow slightly on the last rep, but technique stays solid.
After an RPE 8 set, you could start two more reps with full effort — the first would be hard, the second would be very hard. A third would be near-impossible.
On squat at RPE 8: The walkout and descent are controlled. The last rep has a brief pause or slight slowdown out of the hole, but you finish cleanly.
On bench at RPE 8: The final rep requires intentional engagement of chest and triceps. Bar path stays consistent. No visible form breakdown.
On deadlift at RPE 8: You pull the last rep to lockout, but the back position shows slight rounding. Speed off the floor is normal; lockout requires active attention.
When to use RPE 8: Primary compound movements in the accumulation and intensification phases; most evidence-based strength programs target RPE 8–8.5 for primary lifts.
RPE 8.5 — Between 1 and 2 Reps in Reserve
The half-point increments (8.5, 9.5) are used when you’re genuinely uncertain whether you’re at the integer value below or above. RPE 8.5 means “I could have done one more for certain, and there’s a real possibility I could have squeezed a second — but I’m not sure.”
Use 8.5 liberally in your early months of RPE training — it prevents forced rounding that distorts your estimated 1RM.
RPE 9 — One Rep in Reserve
Hard. The last rep is a genuine effort. You know you had exactly one more — you can feel it, but you have high confidence you could grind it out.
After an RPE 9 set, your rest period naturally extends because you need more recovery. On squat, the bar grinds in the midpoint; on bench, the press slows dramatically at mid-stroke; on deadlift, the bar decelerates noticeably at the knees.
When to use RPE 9: Peaking block top sets; competition-specific work; weeks leading into a meet.
RPE 9.5 — Maybe One Rep Left
The highest training intensity recommended for regular use. You completed the set, and you might have gotten one more — but you genuinely aren’t certain. If you had taken that rep, it might have failed.
RPE 9.5 is used when a lifter wants to push harder than 9 but reserves true maximal testing (RPE 10) for competition or specifically programmed max-effort days.
RPE 10 — True Maximum
You could not have gotten another rep with any amount of additional effort. On the last rep, you may have come close to failing (especially on squat — bar slow, significant fight out of the hole). On bench, the lockout was a genuine grind.
True RPE 10 should be uncommon in training. Reserve it for competition, 1RM testing days, or specifically programmed max-effort work. Training to RPE 10 every session accelerates fatigue accumulation and injury risk without meaningful additional adaptation compared to RPE 8.5–9.
The Half-Point Problem
Most lifters find it easier to rate integer RPEs (8, 9, 10) than half-points (8.5, 9.5). But half-points carry real information:
- RPE 8 and RPE 9 are separated by a meaningful intensity difference
- RPE 8.5 occupies real training space between them
- Using only integers forces you to round in ways that distort 1RM estimates
The RPE Calculator accepts half-point values — use them when your honest assessment is genuinely between two integers.
Distinguishing RPE 8 from RPE 9: The Defining Question
The question that separates 8 from 9: “If I had tried one more rep, would I have completed it with certainty?”
- If yes, definitely — it was RPE 8 (two more were possible; the first of those would have been easy enough to complete)
- If yes, probably — it was RPE 8.5
- If yes, but it would have been a genuine fight — it was RPE 9
- If I’m not sure — it was RPE 9.5
This internal interrogation takes practice to do honestly. Experienced lifters answer it quickly; beginners need time and calibration to develop accurate perception.
For a guide on developing accurate RPE perception from scratch, see How to Learn RPE for Beginners. For the percentage table that converts RPE + reps to estimated 1RM, see the RTS RPE Chart Reference.