plus42-decimal ☆
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Description:
RPN calculator based on HP-42S
Type: Cask  |  Latest Version: 1.3.13@0  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Productivity
Tags: calculator rpn scientific hp42s mathematics productivity
Install: brew install --cask plus42-decimal
About:
Plus42 Decimal is a powerful RPN calculator application that faithfully emulates the HP-42S scientific programmable calculator. It offers high-precision decimal arithmetic, making it ideal for engineering, scientific, and financial calculations where accuracy is paramount. The application includes a full-featured programmable environment and supports extensive binary and decimal number handling.
Key Features:
  • High-precision decimal arithmetic engine
  • Full HP-42S function and programming compatibility
  • Support for binary numbers and hexadecimal operations
  • Large display showing stack, registers, and status
  • Extensive user programmability with custom functions
Use Cases:
  • Scientific and engineering calculations requiring high precision
  • Financial modeling and currency computations
  • Learning and practicing RPN (Reverse Polish Notation) logic
  • Legacy HP-42S program execution and development
Alternatives:
  • Free42 – Plus42 offers decimal arithmetic and extended features, while Free42 focuses on binary floating-point emulation.
  • Numi – Numi is a modern macOS calculator with a focus on natural language input, whereas Plus42 is a dedicated RPN emulator.
Version History
Detected Version Rev Change Commit
Jan 13, 2026 7:35pm 1.3.13 0 VERSION_BUMP 7867258e
Sep 15, 2025 12:47pm 1.3.10 0 VERSION_BUMP 60dac019
Mar 30, 2024 9:38pm 1.1.9 0 VERSION_BUMP 89a41d4c
Feb 11, 2024 4:38pm 1.1.4 0 VERSION_BUMP 93eca4e5
Jan 17, 2024 8:50am 1.1.3 0 VERSION_BUMP 65f94e43
Dec 9, 2023 7:04pm 1.1.2a 0 VERSION_BUMP 8be84f52
Dec 1, 2023 11:40am 1.1.1 0 VERSION_BUMP dd73eeee
Nov 29, 2023 11:34pm 1.1 0 VERSION_BUMP 560fb048
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