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Software · Utilities & files

RPN Calculator

HP Calculator Simulator.

  • Completely free
  • Linux
  • Open source

At a glance

RPN Calculator is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Includes emulators for the HP 35, HP 80, HP 45, HP 70, HP 55, HP 21, HP 22, HP 25, HP 25C, HP 27, HP 29C, HP 31E, HP 32E, HP 33E, HP 33C, HP 34C, HP 37E, HP 38C, HP 38E, HP10, HP 67, HP 10C, HP 11C, HP 12C, HP 15C, and HP 16C. If GTK is available then on models with continuous memory or a card reader, right-clicking on the application window will open a dialog window allowing the user to load a saved program in 'run' mode or save it in 'prgm' mode. The default model can be changed either by right-clicking on desktop icon, or if this isn't supported on your system you can access the configuration dialog from a terminal window using the command flatpak run io.github.mike632t.x11-calc --setup Note - The following fonts should be installed xfonts-base (Debian/Ubuntu), xorg-x11-fonts-base or xorg-x11-fonts-misc (Fedora), font-misc-misc (Gentoo).

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 7 November 2026
  • Description from Flathub — AppStream (Flathub)

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