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One-Rep Max Calculator
Generators · tool
One-Rep Max Calculator
Estimate your 1RM.
Estimated 1RM (Epley)
116.7
Brzycki formula
112.5
95% (2 reps)
110.8
90% (4 reps)
105
85% (6 reps)
99.2
80% (8 reps)
93.3
75% (10 reps)
87.5
70% (12 reps)
81.7
60% (15+ reps)
70
Most accurate for sets of 10 reps or fewer. Always lift with a spotter near your max.
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