One-Rep Max Calculator

A one-rep-max (1RM) calculator is a valuable tool for strength athletes and fitness enthusiasts to estimate the maximum weight they can lift for a single repetition in a particular exercise. This metric is pivotal for designing training programs, setting appropriate weights for different workouts, and tracking strength progress over time. While testing the 1RM directly can be useful, it can also be risky and challenging, especially for beginners. Therefore, many rely on mathematical formulas that estimate 1RM based on the number of repetitions performed with a submaximal weight.

Among the most popular formulas for calculating the 1RM are the Brzycki and Epley formulas. Each formula offers a unique approach and is widely used due to its simplicity and practicality.