This is a Damage Calculator for Generation 1 Pokémon. It is in the form of an Excel document, so you'll need to have a program that can open an Excel file. If you don't have Microsoft Office, I'd recommend downloading OpenOffice Calc from the OpenOffice Suite. It's a perfect alternative. As of release, the latest version can be installed from here: http://www.openoffice.org/download/

Note that this only covers Generation 1. All other Generations have a slightly different calculation.

If you have any problems with it, or find any errors, feel free to contact me on Twitter.