Engineering Calculator
This calculator is noteworthy in that it employs a stack model of computation (Reverse Polish Notation), it supports numbers with SI scale factors and units, and uses a text-only user interface.
Installing
Requires Python version 3.6 or later.
Install with:
pip install engineering-calculator
This installs ec into ~/.local/bin, which should be added to your path.
Unusually, there is also a man page. The Python install process no longer
supports man pages, however you can download it from its Github repository. Place it
in ~/.local/man/man1.
Features
Text-based interactive interface.
Stack-based calculation model
Full scientific/engineering calculator.
Support SI scale factors and units on inputs and outputs.
Supports hexadecimal, octal, and binary formats in both programmers and Verilog notation.
Provides special functionality for electrical engineers.
Examples
Invoke engineering calculator and compute the value of a resistor by dividing the voltage difference across the resistor by the current through it:
> ec
0: 2.5V 250mV - 1mA /
2.25k:
Here a hexadecimal number is converted to and from decimal:
> ec
0: 'hFF
255: vhex
'h00ff:
In this example, a frequency is converted to radians and saved into the variable omega, which is then used to compute the impedance of an inductor and capacitor:
> ec
0: 1MHz 2pi * =omega
6.2832M: 100nH *
628.32m: 1 10nF omega * /
15.915:
Issues
Please ask questions or report problems on Github.