One Rep Max Calculator

Calculate your One Max Rep instantly.

What's Your Score?

Fill out your information for an instant calculation of your One Rep Max.

Your One Rep Max is

Percentage of 1RM Lift Weight Repetitions of 1RM
100% 1
95% 2
90% 4
85% 6
80% 8
75% 10
70% 12
65% 16
60% 20
55% 24
50% 30