The infamous SCAMola said:
Is there a test or something to determine your wpm?
Not an official one as far as I am aware.
Just go into Microsoft Word, set a timer for a minute on your watch etc. and type as fast as you can.
To ensure it makes sense it's probably an idea to write about something you know e.g. what you did that day or something.
At the end of the minute simply look at the word count.
That's how I figured out my approximate wpm anyway.
Maybe there is an official way but it's not like you need an exact number, most people round it up to the nearest 5 or 10 anyway.