Stop doing math between sets.

Stop fumbling with plate math mid-workout. Work in kilograms or pounds: your choice. Save time and maintain focus with Rack Math.

Visualize your bar setup with IPF color-coded barbell diagrams.

Clean, large typography is designed for gym readability.

Dark mode or light modes are available.

No account required. No ads. No data collected. Just focus on your workout.

Plate calculator

Enter a target weight and see which plates to load based on what you have. If the weight can’t be loaded, instantly view the nearest lower and higher weights that are readily available with a single click.

Rack Math

Load Tracker

Easily check your current bar setup.

Build Circuits

Save loadouts for different bars and let Circuit Builder smoothly map plate transitions between sets. For example, in a circuit with squats at 185 lb and bench press at 135 lb, Circuit Builder shows exactly which plates to add or remove for each exercise, allowing seamless switching without recalculating.

Minimum Change Finder

Instantly view which plates to remove or add when switching between exercises.

Gym Presets

Training at multiple gyms? Save different plate inventories for each location and switch instantly when needed.

Experience all features with a 7-day free trial. Afterward, pay just $1.99 one time, forever. Download Rack Math for the iPhone or iPad through the App Store.