How to use the One Rep Max Calculator (with examples)
By the Super Simple Digital Tools Team · Updated June 2026
Whether it's for work, study or everyday life, the One Rep Max Calculator takes the hassle out of everyday calculations. Estimate your one-rep max (1RM) from a lighter set and get a full percentage-of-1RM training table. Free, instant, no signup.
Using it takes seconds: fill in the fields with your numbers, then press Calculate to run the one rep max calculator, then copy the result or try a related tool next.
Instant results — Enter your figures and the one rep max calculator returns an answer in seconds.
Ready to try it? Open the One Rep Max Calculator and get your answer in seconds.
- Instant results: Enter your figures and the one rep max calculator returns an answer in seconds.
- Free & private: Runs in your browser — no signup, and nothing is sent to a server.
- Accurate: Uses standard formulas so you can rely on the numbers.