1RM & RPE Results
Calculate your estimated 1RM (e1RM) and relative intensity targets
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Your Estimated 1RM
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Maximum Strength Capacity
Understanding Estimated 1RM (e1RM)
An estimated 1-rep max (e1RM) allows lifters to track progress without ever having to truly "max out" in the gym. By taking a submaximal set and applying RPE (Rate of Perceived Exertion), we can predict with high accuracy what your absolute peak strength is on any given day.
How to use the 1RM RPE Calculator
To get the most accurate result, enter a set that was between 1 and 8 repetitions. Sets performed at RPE 8, 9, or 10 provide the most reliable data points for the calculation models.
- The RTS Model: Based on the Reactive Training Systems table by Mike Tuchscherer.
- The multi-formula average: Combines Epley, Brzycki, and others to smooth out variances.