Track progress from normal training
You can estimate strength from a working set instead of testing a true 1RM every time.
Training tool
E1RM calculator
Estimate a practical one-rep max from a working set so you can judge progress and choose better training loads.
Example output
Sample estimate from a normal work set
This page shows a fixed example so you can understand the output shape. The full editable calculator stays inside the app.
100 × 5 @ 8
123.3
70%: 86
75%: 92
80%: 99
85%: 105
Best for
Lifters tracking strength without maxing out every week
Use it to
Estimate 1RM from a set you actually performed
Output
An estimated max plus training-load targets
[Why use an E1RM instead of a true max every session?]
Why use an E1RM instead of a true max every session?
Use an estimate to plan working loads
An estimated max can serve as a reference for top sets, back-off work, and weekly adjustments.
Limit frequent max attempts
Estimate performance from submaximal sets instead of testing a true max every session.
[E1RM calculator FAQ]
E1RM calculator FAQ
What is E1RM?
E1RM means estimated one-rep max. It uses a completed set to approximate what you could likely lift for a single rep.
Why include RPE?
RPE helps adjust the estimate based on how close the set was to failure, which makes the result more useful than reps alone.
Should I replace true max testing completely?
No. E1RM is best for regular monitoring, while true max tests are still useful occasionally when your program calls for them.
[More tools]