One Rep Max Calculator

Weight Lifted

Reps Performed
One-rep max
50% 1 RM
55% 1 RM
60% 1 RM
65% 1 RM
70% 1 RM
75% 1 RM
80% 1 RM
85% 1 RM
90% 1 RM
95% 1 RM

Instructions

Enter "Weight Lifted" and "Reps Performed". The repetitions must be between 1 and 10. Press "Calculate" for the weight you may be able to perform for a single repetition.

Brzycki, Matt (1998). A Practical Approach To Strength Training. McGraw-Hill.

Baechle TR, Earle RW, Wathen D (2000). Essentials of Strength Training and Conditioning, 2: 395-425.

dos Remedios R (2007) Men’s Health Power Training, Rodale Inc. 23.