A safer way to estimate your strongest lift
Version 1.6.18The new One Rep Max Calculator 1.0.0 estimates a lifter's one-rep max from a familiar working set, then turns that number into useful training weights.
Two numbers to start
Enter the weight lifted and completed reps. The Epley estimate updates immediately in pounds or kilograms.
Training weights are ready
A percentage table shows practical loads from 40% through 100% of the estimated max, with familiar rep-range guidance.
Other rep targets
Estimated 2-, 3-, 5-, 8-, 10-, and 12-rep maxes make the result useful beyond a single all-out lift.
Built for the gym floor
The phone-first layout uses large controls, keeps the result close, warns when high-rep estimates become less reliable, and calculates everything locally.