Free Lifting Tools
Online calculators for lifters. No sign-up, no ads, no nonsense.
These are the same calculations PRGRS runs on your iPhone — estimated one rep max, training percentages, and barbell loading — free in your browser. They work on any device, and nothing you enter is stored or sent anywhere.
One Rep Max Calculator
Estimate your one-rep max from any set using the Epley, Brzycki, and Lombardi formulas. Use it after a heavy set of 3–6 reps to gauge your max without actually testing it.
Use tool →Barbell Plate Calculator
See exactly which plates to load on each side of the bar for any target weight. Supports kg and lb with standard Olympic bars and plate sizes.
Use tool →