1RM
The maximum amount of weight someone can perform for approximately one repetition. This calculator can estimate it from submaximal training rather than requiring a maximal test.
Free KBRI Training Tool
RPE & Training Intensity Calculator
Enter the weight you're using and the reps you're performing to better understand your training intensity, estimated strength, and perceived effort.
Training intensity and perceived effort are related—but they are not the same thing.
Your set breakdown
Current set
Adjust the highlighted inputs to see your training intensity. The calculator will keep results hidden until the entered values can produce a reliable breakdown.
Foster 0–10 RPE scale
Perceived effort
0
Rest
1
Really Easy
2
Easy
3
Moderate
4
Somewhat Hard
5
Hard
6
Harder
7
Very Hard
8
Very, Very Hard
9
Extremely Hard
10
Maximal Effort
RPE measures perceived exertion. The highlighted region represents estimated effort context unless you report your own RPE.
What does this mean?
% of 1RM
Shows how heavy the working weight is relative to your known or estimated maximum. It is useful context for comparing sets and programming intensity.
RPE
Rate of Perceived Exertion describes how difficult the effort feels to the person performing it. Two people can use the same percentage and feel different levels of effort.
Sleep, fatigue, stress, training experience, exercise selection, recovery, and individual strength endurance can all affect perceived effort. This calculator provides educational fitness estimates and general training references. Individual performance and perceived exertion vary. It is not intended to diagnose, treat, or evaluate a medical condition.
Learn the why. Train with purpose.
Understanding your training is one part of building a stronger foundation. Explore KBRI programs and education when you're ready for more structure or support.
Kelsey's Library · Want to understand RPE, RIR and training intensity?
Read the guide