Health & Fitness
One Rep Max Calculator - 1RM
Estimate your one rep max and training max from a working set.
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Frequently asked questions
Which formula is used?
This calculator uses the Epley formula for estimating 1RM.
How many reps should I use?
Best results are usually with 3-10 reps.
What is training max?
Training max is 90% of estimated 1RM, often used for programming.