No more mental math between sets. Know your plates before you touch the bar.
Every lifter knows the feeling: you're between sets, sweaty hands, chalk on your fingers, trying to figure out which plates to load for your next working set. You do the math in your head — or on your phone's default calculator — and inevitably second-guess yourself halfway through loading the bar.
Plate Calculator & PR Tracker eliminates that friction entirely. Enter your target weight, and within one second you see an accurate, color-coded visual of exactly which plates go on each side of the bar. No mental math. No miscounts. No wasted time between sets.
We built this tool because the alternatives were all wrong: generic calculators with no visual output, cluttered apps trying to be full training programs, or plain text lists that require counting in your head anyway. We wanted something that works the way a real gym environment works — fast, visual, and tolerant of sweaty fingers.
Plate Calculator & PR Tracker is designed for anyone who trains with a barbell:
Powerlifters — track squat, bench, and deadlift PRs with exact weight history. Know instantly what plates load your opener, second attempt, and third attempt.
Olympic weightlifters — the app uses IWF-standard plate colors (the same color system used in every international competition), so the visual barbell matches what you see in the gym.
CrossFit athletes — quickly calculate plates for WOD weights, especially useful when the coach writes a percentage on the board and you need to figure out the actual load.
General gym-goers — anyone who works with barbells and wants to stop doing math during rest periods.
The app uses the International Weightlifting Federation (IWF) color standard — the same system used in Olympic weightlifting competitions worldwide. This means the visual barbell in the app matches what you see in any properly equipped gym:
Using color-coded plates means you can read a loaded barbell in under a second from across the gym — no need to count plates or check weights one by one.
Plate Calculator & PR Tracker is a Progressive Web App (PWA), which means it runs entirely in your mobile browser without requiring an App Store download. iPhone users can use the full app at plate-calc.pages.dev, and Android users can install it from the Google Play Store for a native app experience with no browser chrome.
The PWA version works offline, can be added to your home screen, and saves all your settings and PR data locally on your device. Your data never leaves your phone.
Ready to stop doing plate math in your head?
Free to use. No account required.
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