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

Fitness Standards

We have fitness calculators and cardio standards for running, rowing and cycling. How fit are you?