Build Tool
One Rep Max Calculator
Estimate your 1RM from any set — no need to risk a true max attempt.
Estimated 1RM100 kgAverage of Epley & Brzycki
Epley101 kg
Brzycki99 kg
90% (heavy strength)90 kg
80% (strength/hypertrophy)80 kg
70% (volume work)70 kg
Estimates get less accurate above 10 reps — test with a hard set of 3–8 reps for the best number. An estimated 1RM is for programming your training percentages; it is not a dare to attempt a true max without a spotter and proper setup.
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