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.
pip3 install engineering-calculator --user
Requires Python version 3.6 or later.
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.
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: