One Rep Max Calculator
The Epley estimate multiplies the lifted weight by one plus repetitions divided by 30.
This calculator is free to use. Enable JavaScript to enter your values and see a result instantly.
How it works
The Epley estimate multiplies the lifted weight by one plus repetitions divided by 30.
Worked example
80 kg for five repetitions estimates about 93.3 kg for one repetition.
Keep in mind
Strength estimates become less reliable at high repetition counts.