One Rep Max Calculator

Calculate your one-rep max (1RM) for any lift. Your one-rep max is the max weight you can lift for a single repetition for a given exercise.

Repetition Percentages of 1RM

Repetitions Percentage of 1RM
1 100%
2 97%
3 94%
4 92%
5 89%
6 86%
7 83%
8 81%
9 78%
10 75%
11 73%
12 71%
13 70%
14 68%
15 67%
16 65%
17 64%
18 63%
19 61%
20 60%
21 59%
22 58%
23 57%
24 56%
25 55%
26 54%
27 53%
28 52%
29 51%
30 50%

Rate Your Lifts Against Other People

The Strength Level Calculator can show your exact level of strength at any bodyweight.

Calculate Your Strength