1. Select archived month
2. Copy all posts
3. Paste in MS Word or any other text editor
4. Choose "Tools, Word count"
5. Divide by posts
The number you get is the average word count per post for any given month.
This simple method was brought up by the Twitter discussion below:
AllergyNotes Still amazed by the amount of text produced by some bloggers. Nothing wrong with it, just different from the way I use blogs for short notes
laikas perhaps they don't use it 4 short notes
AllergyNotes @laikas "Amazed by amount of text by some bloggers - phaps they don't use it 4 short notes" - Apparently not.... :)
AllergyNotes @ctsinclair "Pallimed Avg words per post: Jan 2009: 496 words/post" - Any easy way to calculate this?
ctsinclair quick & dirty avg words/blog post. select archived month, copy & paste all posts -> word; tools->word count; divide by posts