Calculator
RPE and RIR chart
What a set of reps at a given RPE implies about your one-rep max.
| RPE | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 100.0% | 95.5% | 92.2% | 89.2% | 86.3% | 83.7% | 81.1% | 78.6% | 76.2% | 73.9% | 70.7% | 68.0% |
| 9.5 | 97.8% | 93.9% | 90.7% | 87.8% | 85.0% | 82.4% | 79.9% | 77.4% | 75.1% | 72.3% | 69.4% | 66.7% |
| 9 | 95.5% | 92.2% | 89.2% | 86.3% | 83.7% | 81.1% | 78.6% | 76.2% | 73.9% | 70.7% | 68.0% | 65.3% |
| 8.5 | 93.9% | 90.7% | 87.8% | 85.0% | 82.4% | 79.9% | 77.4% | 75.1% | 72.3% | 69.4% | 66.7% | 64.0% |
| 8 | 92.2% | 89.2% | 86.3% | 83.7% | 81.1% | 78.6% | 76.2% | 73.9% | 70.7% | 68.0% | 65.3% | 62.6% |
| 7.5 | 90.7% | 87.8% | 85.0% | 82.4% | 79.9% | 77.4% | 75.1% | 72.3% | 69.4% | 66.7% | 64.0% | 61.3% |
| 7 | 89.2% | 86.3% | 83.7% | 81.1% | 78.6% | 76.2% | 73.9% | 70.7% | 68.0% | 65.3% | 62.6% | 59.9% |
| 6.5 | 87.8% | 85.0% | 82.4% | 79.9% | 77.4% | 75.1% | 72.3% | 69.4% | 66.7% | 64.0% | 61.3% | 58.6% |
| 6 | 86.3% | 83.7% | 81.1% | 78.6% | 76.2% | 73.9% | 70.7% | 68.0% | 65.3% | 62.6% | 59.9% | 57.2% |
Columns are reps. A cell is the percentage of your one-rep max that set represents. RPE 8 × 5 reps ≈ 81% of max.
How it is calculated
RPE here is the Reactive Training Systems scale: RPE 10 means no reps left, RPE 9 means one left, RPE 8 means two. RIR (reps in reserve) is the same idea counted the other way.
These percentages are a widely used convention rather than a measured law of nature. Individuals vary a lot — some lifters can grind far more reps at 85% than the table expects, and some fewer. Use it to plan, then correct it against what you actually do.