One rep max calculator
Estimate 1RM and prepare loads from 60% to 95%.
NALKO
Strength services
A free strength calculator for smarter training loads
Estimate one-rep max from a submaximal set and turn it into a load table. The result is instant; an account only keeps each exercise and trend.
Free, no credit card
1
tool available
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Services
Strength tool available
One focused 1RM page with kg/lb, visible methodology and authenticated history.
Worked examples
How an estimate becomes a useful decision
These examples describe the software output. They are not instructions to attempt a true maximum.
80 kg × 6 reps
Epley produces 96 kg before rounding. With a 2.5 kg increment, the tool displays 95 kg and calculates working loads from 60% to 95%.
Compare the same lift
Saving a later 82.5 kg × 6 estimate for the same exercise creates a comparable trend without logging a workout that never happened.
Why these tools are different
Why these tools are different
No real max attempt required
A clean set of 1–12 repetitions produces an Epley estimate.
Actionable load ranges
The 60–95% table turns the estimate into practical session references.
History by exercise
Signing in stores estimates separately without creating a fake completed workout.
From search to a useful action
From search to a useful action
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Enter one set
Add the load, repetitions, unit and exercise.
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Read it as an estimate
Use the number as a programming reference, not a promise.
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Compare over time
Save only when you want to follow the same movement.
FAQ
Frequently asked questions
Which strength calculator is available?
The first tool is an Epley 1RM calculator with percentage table and optional exercise history.
Does it replace a coach or supervised max test?
No. It estimates strength from a submaximal set and cannot capture every difference in technique, fatigue or exercise.