1RM Calculator
Enter a weight and the reps you lifted it for. The calculator runs 7 established formulas and averages the results for a more reliable estimate. Learn how to use your 1RM.
Accuracy drops above 10 reps. For best results, use a weight you can lift to failure in 3–6 reps.
Suggested 1RM
--kg
| % 1RM | Weight | ~Reps |
|---|