One Rep Max Calculator
Calculate your one rep max (1RM) for any lift online for free. Estimate max strength from submaximal reps using multiple formulas.
1RM
Coming SoonHealth & Fitness
The full version of One Rep Max Calculator is being built right now. We add new fully functional tools every week. In the meantime, you can use the basic workspace below.
About One Rep Max Calculator
Calculate your one rep max (1RM) for any lift online for free. Estimate max strength from submaximal reps using multiple formulas.
This tool is completely free and runs 100% in your browser. Your data is never uploaded to any server — everything is processed locally on your device for maximum privacy and speed.
About One Rep Max Calculator
Calculate your one rep max (1RM) for any lift online for free. Estimate max strength from submaximal reps using multiple formulas.
Features
- 100% free with no sign-up required
- Runs entirely in your browser for full privacy
- No data stored, no files uploaded to servers
- Works on desktop and mobile devices