Tools
Free tools for your next workout.
Six quick calculators for the numbers lifters reach for most. There is nothing to install and nothing to sign up for.
RPE and RIR Calculator
Convert RPE to reps in reserve, and see roughly what percentage of your max a set represents.
RPE 8 means 2 reps in reserve. That set is about 83% of your one-rep max.
Reps in reserve
2
Approximate % of one-rep max
83%
What it feels like
You had two reps left.
| RPE | 1 rep | 2 reps | 3 reps | 4 reps | 5 reps | 6 reps | 8 reps | 10 reps |
|---|---|---|---|---|---|---|---|---|
| 10 | 100% | 97% | 94% | 92% | 89% | 86% | 81% | 75% |
| 9.5 | 99% | 96% | 93% | 90% | 88% | 85% | 79% | 74% |
| 9 | 97% | 94% | 92% | 89% | 86% | 83% | 78% | 72% |
| 8.5 | 96% | 93% | 90% | 88% | 85% | 82% | 76% | 71% |
| 8 | 94% | 92% | 89% | 86% | 83% | 81% | 75% | 69% |
| 7.5 | 93% | 90% | 88% | 85% | 82% | 79% | 74% | 68% |
| 7 | 92% | 89% | 86% | 83% | 81% | 78% | 72% | 67% |
| 6.5 | 90% | 88% | 85% | 82% | 79% | 76% | 71% | 65% |
RPE and reps in reserve. Reps in reserve counts how many more reps you could have done. RPE rates the same effort out of 10, so RPE 8 means two reps in reserve and RPE 10 means none. The percentages are estimates from a standard rep formula, and they vary from person to person and from lift to lift.
In Liftr. You can record RPE or reps in reserve with every set you log.
Let Liftr do the maths while you lift.
Track your workouts with just a tap, and see your strength, volume and records update on their own.
