Easy to use - just cut and paste your text into the box below for an instantaneous word count.
(be aware that this counter tends to total a bit higher than Nanowrimo's counter)
Here's how to update your word count in NaNoWriMo's website.
See also different methods.
If you're on an iPad or Mac, check out WriteRoom - a very easy-to-use, clean, distraction-free space to write your novel (it also has its own built-in word-count tool which is very close to Nanowrimo's counter.)
See more minimalist writing apps for Mac.
Here are more distraction free writing apps for Mac, Windows and web.
Or you can always stick with pen and pad.