One Rep Max Calculator

Your One Rep Maximum is the amount of weight that you can lift just one time. Use this calculator without actually attempting it and potentially injuring yourself.

Most people should train at 65% to 85% of their 1 REP MAX. 8 to 12 REPS AT 70% to 80% is standard. 65% or less is a good place to start for beginners.

in Pounds

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