One-Rep Max Calculator
Epley: 1RM = w × (1 + reps/30).
Educational only - not medical advice. Consult a qualified professional before changing exercise, diet, caffeine, pregnancy, or health routines.
About this tool
One-Rep Max Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Fitness & Health — Personal. Browse more Fitness & Health — Personal tools.