About this tool
Estimate your one-rep max (1RM) from the weight you lifted and the number of reps, averaging the Epley and Brzycki formulas, and see a table of training loads from 95% down to 60%. Computed live in your browser.
Frequently asked questions
How is the 1RM estimated?
It averages two well-known formulas, Epley and Brzycki. Estimates are most accurate for lower rep counts, roughly under ten reps.
What are the percentages for?
They show suggested training loads as a share of your 1RM, useful for planning sets at a given intensity.