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Free workout tool
One Rep Max Calculator
Estimate a one rep max from a recent set with the Epley and Brzycki formulas, then compare practical training percentages.
Estimate your one rep max
Enter a recent hard set between 1 and 12 reps. This calculator averages the Epley and Brzycki formulas, so use the result as a planning estimate.
Estimated 1RM
114.5
kg
100%
114.5 kg
95%
109 kg
90%
103 kg
85%
97.5 kg
80%
91.5 kg
75%
86 kg
70%
80 kg
65%
74.5 kg
Estimates vary by exercise, technique, and fatigue. Choose a practical training load and adjust from the sets you actually complete.
Take the next session into Phemilo.
Build the workout on iPhone, log each set from Apple Watch, and keep the result with your training history.