Be careful doing that -- it's a great help (and I use LLMs for EE stuff too) but one thing LLMs still suck at is unit conversion. If you ever need to mix angular frequency (omega) and hertz, for instance, you'll need to tread VERY carefully. Same with anything involving gas laws, nuclear radiation, or vacuum tech, where there seem to be 20 different ways to express every quantity.

As for calculators, nothing I've found beats Jupyter QtConsole. It launches at startup and I have a hotkey mapped to bring up the window.