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.
OpenWarm-up Sets Calculator
Calculate a warm-up set ramp and plate combination tailored to your working weight.
OpenRPE ↔ %1RM Converter
Find your intensity (% of 1RM) and estimated 1RM from RPE and reps.
OpenRelative Strength Score (DOTS)
Calculate your DOTS relative-strength score from total weight lifted and body weight.
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.
OpenBMI Calculator
Calculate your Body Mass Index (BMI) and healthy weight range from your height and weight.
OpenBody Fat % Calculator
Estimate your body fat percentage using only tape-measure circumference measurements with the US Navy method.
OpenCalories Burned Calculator
Calculate calories burned based on exercise type, duration, and body weight (MET-based).
OpenIdeal Body Weight & Lean Body Mass Calculator
Calculate ideal body weight (IBW) and lean body mass (LBM) from height and sex.
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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