R47 Calculator Explorer
Information
Links and usage guides for the R47 web calculator and its interactive reference.
R47 RPN Calculator
Download on the App StoreInstall the native iPhone and iPad app from the App Store. It runs the full R47 RPN scientific calculator with the HP-style program editor and built-in tutorials, works offline, and keeps your programs and states saved between sessions.
R47 RPN Calculator & Explorer
Get it on Google PlayInstall the native Android app from Google Play. It runs the full R47 RPN scientific calculator with the program editor and built-in tutorials, works offline, and keeps your programs and states saved between sessions.
R47 Web Calculator
r47.dansbeesllc.comOpen this link on your iPhone or Android to use the R47 RPN scientific calculator in your browser. For the best experience, install it to your home screen — it will launch full-screen like a native app, works offline, and keeps your programs and states saved between sessions.
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iPhone / iPad
Open in Safari, tap the Share button, then choose
Add to Home Screen. -
Android
Open in Chrome, tap the menu (⋮), then choose
Add to Home screen. - Desktop Works in any modern browser. Chrome and Edge also support installing it as a desktop PWA via the address-bar install icon.
R47 Calculator Explorer
47explorer.dansbeesllc.comThe Calculator Explorer is an interactive reference for the R47 firmware. It documents all 600+ functions, keys, and soft-key menus — with descriptions, stack diagrams, and usage notes. A live embedded calculator sits alongside the reference so you can try any function immediately as you read about it.
Use the left-hand navigation tree to browse by key or menu, or use search to jump directly to any function. Clicking a key in the embedded calculator highlights the matching reference entry.