Free One Rep Max Calculator (1RM) Online
Estimate your one-repetition maximum (1RM) for bench press, squat, deadlift using Epley, Brzycki, Lombardi, and other validated formulas for strength programming. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Enter Weight Lifted
Input the weight used in your test set (in kg or lbs).
Enter Reps Performed
Input number of repetitions completed (best accuracy at 2–10 reps).
View 1RM Estimates
See estimated 1RM from all major formulas and training load percentages for each rep range.
Frequently Asked Questions
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