How it works
Epley, Brzycki and Lombardi formulas infer a maximum from the weight lifted and completed repetitions.
Captain Workout tools
1RM Calculator
Estimate your one-repetition maximum from a recent set and turn it into useful training loads without testing a true max.
Choose a good set
Use a recent hard set with controlled technique. Estimates become less reliable as the repetition count rises.
Train intelligently
A calculated 1RM helps prescribe load without frequent maximal attempts. Recalculate when your working sets improve.