To check your word count quickly in a Google Doc, using your keyboard, simply press cmd + shift + C. On a Mac, it's ⌘ + shift + C.
If keyboard shortcuts aren't your thing, then you can use the Google Docs menu, as well, to check your word count.
- Go to Tools.
- Select Word Count.
Bonus: how to show your word count in Google Docs as you type
When viewing the word count of your Google Doc, check the box marked "Display word count while typing."