One Rep Max Calculator | 1RM Strength Calculator
Estimate your one rep max (1RM) using four proven formulas: Epley, Brzycki, Lander, and Lombardi. Generates a complete training weight table from 50–100% of your max for structured strength programming. Designed specifically for developers and professionals, this free online calculator runs entirely in your browser to process tasks quickly and securely. Enjoy unlimited usage with no data tracking and no registration required.
Also known as: one rep max calculator online free · 1rm strength calculator tool · epley formula 1rm calculator · max lift weight calculator · powerlifting one rep max calculator · calculate one rep max online · 1rm to training weight calculator · brzycki lander formula calculator · one rep max calculator · 1rm calculator · max lift calculator · epley formula calculator · strength calculator · one rep max formula · powerlifting calculator · training weight calculator
Liked this tool?
DevToolLab is free to use. If this calculator saved you some time today, please consider supporting our work.
Frequently asked questions
What is One Rep Max Calculator used for?
Estimate your one rep max (1RM) using four proven formulas: Epley, Brzycki, Lander, and Lombardi. Generates a complete training weight table from 50–100% of your max for structured strength programming.
Is One Rep Max Calculator free to use?
Yes. One Rep Max Calculator is completely free with no usage limits, and there is no paid tier required to use it.
Do I need an account to use One Rep Max Calculator?
No. One Rep Max Calculator works immediately in your browser with no signup, login, or email address required.
Related Tools
Calculate percentages easily: find X% of Y, what percent X is of Y, percentage change, and increase/decrease by percentage.
Calculate your exact age in years, months, days, hours, and minutes. Find your zodiac sign, day of birth, and countdown to next birthday.
Calculate the duration between two dates or add/subtract time periods from a date. Count workdays, weekends, and total days.