One Rep Max

One Rep Max

A calculator for estimating your 1RM in weightlifting sports

3 followers

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One Rep Max is a simple tool for estimating lifting maxes. You can use the browser version, or you can add the app to your home screen on your phone (and even use it offline). Customize the results by changing the formula, rounding, increment, and unit.
One Rep Max gallery image
One Rep Max gallery image
One Rep Max gallery image
Launch tags:Health & Fitness•Sports•Tech
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What do you think? …

Alec Rios
PayNano
Maker
Thanks for checking out One Rep Max! I built this calculator because I wanted a modern, clean-looking 1RM calculator that I could use on my desktop or my mobile device. Let me know what you think!
Dominik Sobe
HelpKit Knowledge Base
Thanks for making it! I love simple, one-purpose easy to use products like this :)
Alec Rios
PayNano
Maker
@sobedominik Same here, thanks for the comment!
Hong Jeon
Doesn't the 1RM calculation vary for different exercises?
George Pagan III
But it shouldn't really matter if you are individually looking at the 1 rep max for each exercise, and not trying to put one rep max for one exercise and generate a 1rm for another exercise given those numbers.