โฝ Sports
One Rep Max Calculator
Several formulas estimate a one rep max from a set of five or eight: the Epley formula multiplies the weight by one plus reps divided by thirty. Accuracy is best between three and ten reps, and declines at higher rep ranges.
How it works
Weight lifted
Reps completed
Unit
One rep max (Epley)
One rep max (Brzycki)
One rep max (Lombardi)
Average estimate
Training percentages
Note
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.