1RM Calculator
Estimate your one-rep max (1RM) based on the weight you can lift for multiple repetitions. Perfect for planning your strength training.
About 1RM
1RM (one-rep max) is the maximum weight you can lift for a single repetition. This calculator uses the Epley formula to estimate your 1RM based on submaximal lifts. For safety, always test your actual 1RM with proper form and a spotter when possible.