One Rep Max Calculator
Calculate your estimated one-rep max (1RM) and training percentages using Epley, Brzycki, and Lombardi formulas.
About 1RM Estimation
One Rep Max (1RM) is the maximum weight you can lift for a single repetition. Formulas estimate it from submaximal lifts. Epley and Brzycki are the most popular. Accuracy decreases above 10 reps. Training percentages help program sets and reps for different goals: strength (85-95%), hypertrophy (70-85%), endurance (60-70%).
About This Tool
The One Rep Max Calculator estimates your maximal strength for a single repetition of an exercise, crucial for weightlifters and fitness enthusiasts. It uses formulas like Epley and Brzycki to calculate your one rep max based on the number of reps performed at a given weight.
Inputs include the weight lifted and the number of repetitions completed. Outputs are estimates of your one-rep maximum using different calculation methods, providing insights into strength levels without needing actual 1RM testing.
Use this tool for setting realistic training goals or comparing performance over time. It runs entirely in your browser with no data sent to servers; there's no need to sign up.