๐ Health & Fitness
One Rep Max Calculator
A true one rep max is risky to test and hard to repeat. Estimating it from a submaximal set is accurate enough for programming, and averaging several formulas reduces the error of any single one.
How it works
Weight lifted
Repetitions completed
Epley
Brzycki
Lombardi
Average estimate
90% of one rep max
Frequently asked questions
How do I use the One Rep Max Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.