RPE Chart Explained: RPE 6–10 in Plain Language
RPE — Rating of Perceived Exertion — answers one question after a set: "How many more reps could you have done?" That is all it is. RPE 10 means none, you were done. RPE 8 means two more were in the tank. Everything else on the chart is that single idea, written out. If you have avoided RPE because it looked complicated, this page is the whole system.
The chart
| RPE | Reps in reserve | How it feels |
|---|---|---|
| 10 | 0 | Maximum effort — another rep was impossible |
| 9.5 | 0–1 | Maybe one more, but only with form breakdown |
| 9 | 1 | Definitely one more rep, definitely not two |
| 8.5 | 1–2 | One more for sure, a second is a maybe |
| 8 | 2 | Two solid reps left — the classic top-set target |
| 7.5 | 2–3 | Challenging but comfortable |
| 7 | 3 | Bar speed still fast; a working set, not a grind |
| 6.5 | 3–4 | Moderate — technique practise territory |
| 6 | 4 | Easy; could repeat this set many times over |
Below RPE 6 the ratings stop being useful for barbell training — everything feels like "warm-up" and lifters cannot judge the differences reliably. That is why most programmes only prescribe RPE 6 and up. Rate the set that just happened, honestly, and the RPE calculator will turn it into an estimated max and working weights.
What the half points are for
New lifters often find the .5 ratings precious, but they solve a real problem: the gap between "one more rep" (9) and "two more reps" (8) is the most-used territory in training, and it is wide. RPE 8.5 — "one more for sure, maybe two" — is where a lot of honest top sets actually live. Use whole numbers while you are learning; add halves when you catch yourself arguing between two ratings. If you cannot decide between 8 and 8.5, it changes nothing that matters — record 8.5 and move on.
From RPE to percentages
RPE combines with reps to estimate a percentage of your max. Some useful landmarks:
| Set | ≈ % of 1RM |
|---|---|
| 1 rep @ RPE 10 | 100% |
| 1 rep @ RPE 9 | ~96% |
| 1 rep @ RPE 8 | ~92% |
| 3 reps @ RPE 9 | ~89% |
| 5 reps @ RPE 8 | ~81% |
| 5 reps @ RPE 10 | ~86% |
| 8 reps @ RPE 9 | ~77% |
Check that maths against your own training: a 5-rep set at RPE 8 with 100 kg implies an estimated max around 123 kg (100 ÷ 0.81). That estimate is the bridge between effort-based and percentage-based training — and the reason RPE users can set next week's weights without ever testing a single, something our training percentages guide approaches from the other direction.
Why lifters bother with RPE at all
Because your strength is not the same every day. Sleep, food, stress and accumulated fatigue swing your true daily max by a few percent either way. A percentage programme cannot see that; it orders 85% whether you are fresh or wrecked. RPE adjusts the load to the lifter who actually showed up: "a triple at RPE 8" is 140 kg on a great day and 132 kg on a bad one, and both sessions deliver the intended stimulus. The next article in this series, how to use RPE in training, shows how to build sessions around that idea.
Rating honestly: the learning curve
Expect your first month of ratings to be off by about one point — nearly everyone underestimates how much they had left at first, because a hard set feels maximal before it is. Two calibration tricks: film your sets and watch bar speed (a set whose last rep flew was not RPE 9, whatever it felt like), and occasionally take a set you rated to true failure on a safe accessory lift to learn what a real 10 feels like. Accuracy comes with reps of rating, just like reps of lifting.
Frequently asked questions
What is the difference between RPE and RIR?
They are the same scale read from opposite ends. RIR ("reps in reserve") states the reserve directly: RIR 2 = RPE 8. RPE is the older, more common language in powerlifting programmes; use whichever you think in, they convert one-to-one from RPE 6 upwards (RPE = 10 − RIR).
Can beginners use RPE?
Yes for accessories and volume work, cautiously for heavy barbell sets. Beginners have not yet learned what true failure feels like on a squat, so their ratings drift. A sensible path: programme beginners on percentages first, have them record RPE alongside for a few months, then let RPE steer once the ratings prove accurate.
My programme says "@8" but doesn't say reps. What does that mean?
It usually appears next to a set and rep scheme written elsewhere — for example "1×3 @8" means one set of three reps, choosing the load that leaves two reps in reserve. Some programmes write "@8" after a top single. The reps are always specified somewhere; RPE only replaces the load.