Online Tool Store
RPE to Percentage Converter
Enter an RPE value and your one-rep max to calculate the equivalent percentage and working weight. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
RPE to %1RM chart
Example shown — replace it with your own RPE and 1RM.
How it works
- Enter an RPE value and your one-rep max.
- The RPE is mapped to its approximate %1RM.
- See the calculated working weight instantly.
Conversion uses a published RPE-to-percentage chart from powerlifting programming research, then multiplies your 1RM by that percentage — a standard method for translating a felt-effort scale into a concrete training weight.
FAQ
Is my training data uploaded anywhere?
No. Conversion happens entirely in your browser — nothing is sent to a server.
What is RPE?
Rate of Perceived Exertion — a 1-10 scale for how hard a lift felt, widely used in strength training to autoregulate intensity without needing a fresh 1RM test every session.
How is RPE converted to a percentage?
Using a standard RPE-to-%1RM chart developed for powerlifting programming, mapping each RPE value to an approximate percentage of your one-rep max.
How accurate is the conversion?
It's a well-established estimate, not an exact science — actual percentages vary by lift, fatigue, and individual, so use it as a guide alongside your own training feedback.
How we compare
| Feature | Online Tool Store | Memorizing the chart | Training app subscriptions |
|---|---|---|---|
| Calculates working weight directly | ✓ | Requires memorizing the whole table | ✓ |
| Free, no subscription | ✓ | ✓ | Often subscription-based |
Training apps do this and more, but cost a subscription. RPE to Percentage Converter gives the same quick lookup for free.