Simeon Simeonov, the Founder & CEO of FastIgnite, has put together a nice Stock Option Vesting Calculator. It works just fine for stock vesting as well.
Sim is a dynamite entrepreneur who has also done a tour of duty as a VC so he knows the drill well. In the email he sent me about it he said it was inspired to put it together after reading several of the posts in the Term Sheet Series that Jason Mendelson and I wrote several years ago.
Sim ā next up ā how about a simple liquidation preference and exit analysis calculator?

Brad, good idea. I will try to re-purpose one of the several spreadsheets I've built over the years for exit analysis.
Also, I'm looking for other great startup tools, spreadsheets, calculators + hacks I can link to from the startup tools section of my site. Readers, please comment here and/or tweet suggestions to @simeons.
Thanks!
Comment by @simeons — November 10, 2009 @ 12:55 am
Check out @CompStudy at http://compstudy.com/. Lots of data on startup compensation.
Comment by @altgate — November 10, 2009 @ 1:00 am
Brad, whats up with all the lose weight ads on your blog? Is somebody not training for their 50 marathons?
Comment by Cookie Monster — November 10, 2009 @ 4:05 pm
Iām eating too many cookies.
Comment by Brad Feld — November 10, 2009 @ 4:16 pm