How do I type a 'µ' (micro) symbol? [duplicate]

On a German keyboard layout I just need to press Alt Gr+m to get a 'µ' (micro) symbol.

How to do so on a English (US) keyboard?

While the approach suggested by @DK Bose within the comments is completely correct, another possible solution is to create custom keyboard shortcut that uses xdotool as command in the following way:

xdotool type --clearmodifiers 'µ'

Source of the idea is provided within the comments of this answer. xdotool should be installed:

sudo apt install xdotool

This shortcut (Ctrl+Shift+M as it is defined above) works also within wine applications, the only specific thing is that you should press Ctrl+Shift for about 1 second and then press M.