Every gym calculation you need, in one place
1RM (one-rep max), plate loading, protein intake, and carb/protein/fat macros. We've gathered the calculators lifters use every day into a single site. No install, no sign-up — get instant results right in your browser.
1RM Calculator
Estimate by Formula
% Set Table (by Training Intensity)
Plate Calculator
Enter your target weight to see the plate combination to load on each side of the barbell.
OpenProtein Calculator
Calculate your daily recommended protein, meal distribution, and food equivalents from your body weight and goal.
OpenNutrition Calculator
Calculate your BMR, TDEE, and the calories and carb/protein/fat grams that fit your goal.
OpenLift Directory
Strength standards (bodyweight multiples) and 1RM set tables for major lifts, organized by movement.
OpenGuides
A collection of concepts on 1RM formulas, the science behind protein needs, macro setup, progressive overload, and more.
OpenAbout & FAQ
See the key features, how to use the site, and frequently asked questions on the About page.
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