1RM Calculator

Calculate Your 1RM

Estimate your maximum lift based on your current performance.

Weight Lifted (kg/lbs)

Reps Performed (1-30)

How It Works

We use the Epley formula: 1RM = Weight × (1 + Reps/30). This is one of the most accurate methods for estimating your maximum strength based on sub-maximal performance. For best results, use a weight you can lift for 1-10 reps.