pcalc
A terminal calculator for programmers working with binary, hexadecimal, and decimal numbers, bitwise operations, and custom operand sizes.
What is pcalc?
Programmer Calculator (pcalc) is a terminal-based tool designed for software developers and embedded engineers who need to perform calculations involving multiple number representations and bit-level manipulations. It provides an efficient interface for working with binary, hexadecimal, and decimal numbers simultaneously, addressing the limitations of clunky online tools. The tool supports custom operand sizes, bitwise operations, and a customizable interface to maximize productivity in hardware-close programming tasks.
Software developers, embedded engineers, and anyone working close to the hardware, such as those developing emulators (e.g., Nintendo Gameboy Emulator) or systems programming, who require frequent bit-level calculations and multi-representation number handling.
Developers choose pcalc for its terminal-based efficiency, allowing seamless multitasking without switching to online tools, and its flexibility in handling complex expressions with operator precedence, custom bit-widths, and a highly customizable interface that can be tailored to individual workflows.
Overview
Terminal calculator made for programmers working with multiple number representations, sizes, and overall close to the bits
Use Cases
Best For
- Performing bitwise operations (AND, OR, XOR, shifts, rotates) directly in the terminal for embedded systems development.
- Converting and calculating with mixed number representations (binary, hexadecimal, decimal) in a single expression, such as '0xff + 0b101101 - 5'.
- Working with custom operand sizes (1 to 64 bits) to match specific data types like 8-bit or 16-bit integers in low-level programming.
- Customizing a calculator interface by toggling history, number representations, and colors to suit personal preferences and reduce clutter.
- Handling endianness swaps and two's complement calculations for hardware-related tasks, such as emulator development or network programming.
- Using inline math with operator precedence and parentheses for complex expressions without leaving the terminal environment.
Not Ideal For
- Projects requiring floating-point or high-precision scientific calculations, as pcalc focuses on integer and bitwise operations.
- Teams preferring graphical user interfaces with mouse interactions over terminal-based tools for visual ease.
- Environments where installing C dependencies like ncurses is impractical, such as minimal or locked-down systems.
Pros & Cons
Pros
Allows simultaneous use of binary, hexadecimal, and decimal numbers in expressions like '0xff + 0b101101 - 5', eliminating the need for separate conversion tools.
Includes AND, OR, XOR, shifts, rotates, NOR, and endianness swaps, covering most low-level programming needs directly from the terminal.
Enables toggling history, number representations, and colors via commands or aliases, allowing users to tailor the display to their workflow.
Supports 1 to 64-bit widths with commands like '16bit', making it ideal for embedded systems where data types vary.
Cons
Lacks floating-point support, limiting its usefulness for scientific or financial calculations that require decimal precision.
Building from source requires ncurses library, which may not be pre-installed, adding setup complexity for some users.
Primarily available via Homebrew or AUR, with source build as an alternative; not widely packaged for all Linux distributions or Windows native.
Frequently Asked Questions
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