Estimate your one-rep max across any lift — using Epley, Brzycki, and Lombardi formulas. Plus get your working percentages for every set.
Enter your lift details to see your estimated one-rep max and working percentages.
Now you know your max. These programs help you build on it every single week.
Daily workouts, progressive overload built around your strength levels, and accountability that holds.
Direct guidance from certified trainers. Custom programming built around your numbers and schedule.
500+ guides covering every workout style, demographic, and goal. No signup, no paywall.
Corporate wellness available online or in person. Increase engagement, reduce absenteeism.
Three steps from your working set to your estimated max.
Pick your exercise, enter the weight you lifted and how many reps you completed. Works best with sets of 2-10 reps.
Epley, Brzycki, and Lombardi each use a different model to predict your one-rep max. We average all three for accuracy.
Your percentage table shows the exact weight to load for any rep range — from heavy singles to high-rep sets.