RPE Calculator
Estimate workout intensity with the Borg RPE scale (6–20). View the RPE chart, log multiple sets with heart rate, and use the target heart rate helper based on age and resting HR. Informational only—consult professionals.
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Borg RPE Scale (6–20)
| RPE | Description | Intensity |
|---|---|---|
| 6 | No exertion | Very Light |
| 7-8 | Extremely light | Very Light |
| 9-11 | Light | Light |
| 12-13 | Somewhat hard | Moderate |
| 14-16 | Hard | Hard |
| 17-18 | Very hard | Very Hard |
| 19-20 | Maximal exertion | Maximal |
Current RPE
Current RPE: 13
Somewhat hard (Moderate intensity)
Session Logging
Track multiple sets with RPE, heart rate, and duration.
| Set # | RPE | HR (bpm) | Duration (min) | Action |
|---|
Target Heart Rate Helper
Estimate the heart rate needed for a target RPE based on your age and resting heart rate.
How it Works
RPE (Rate of Perceived Exertion) is a subjective scale (6–20) to gauge exercise intensity. The target heart rate helper estimates the HR needed for a given RPE using the formula:
Target HR = Resting HR + (Max HR − Resting HR) × ((RPE − 6)/(20 − 6))
Example
Age 30, Resting HR 60, Target RPE 14 (Hard):
- Max HR = 220 − 30 = 190 bpm
- Target HR = 60 + (190 − 60) × ((14 − 6)/(20 − 6))
- Target HR = 60 + 130 × (8/14)
- Target HR ≈ 134 bpm
Tips & Notes
- Use RPE to modulate intensity; aim for your target zone.
- Log multiple sets to see average RPE and HR over a workout.
- The max HR formula (220−Age) is an estimate; consider measuring your true max HR.
- RPE is subjective—calibrate it with actual HR measurements over time.
FAQs
Disclaimer
Informational estimate only. RPE and HR calculations are approximations. Consult qualified fitness or medical professionals for training advice.