Each screen has a button. Click that to get help for that portion of the app.

If you're a more visual learner, you can find an excellent summary of much of the app in a video created by

Who makes this thing work?

  • Jeff Demers - Owner and Lead Programmer
Individuals who have generously chosen to make monthly contributions. Make your own contribution here.
  • Benjamin Ng
  • Bruno
  • Mook
  • Cody Norton
  • Emanuel May
  • Jerry Crutchfield
  • Jeremy Paris
  • John Harmon
  • K Abson
  • Ryan Quinn
  • Claus Bundgaard Rasmussen
  • Brett Tamahori
  • Alexander Shtanenko
Individuals who have made one-time donations. Make your own contribution here.
Development Contributors
  • Jeff Lauder - Programmer
  • Patricia Gauronskas - Programmer
  • Jeremy Paris - Spotify Curator
  • James Millar - Index Transcription
  • The Index Imp - Index Transcription
  • Brian Thomas - DF8 Treasure Generator web service
  • Communist Doggo - Help Icon Text for Most Screens
  • Weby - Original (retired)Treasure Generator data
Testing Contributors Legal Counsel
  • Georg LaBonte

I love the Calculator! How can I help?

Currently we need all sorts of help! if you'd like to help with any of the following, please email us at

  • Help us code! Always looking for new talent to help make the site better for the good of all the community.
  • Transcribing book indexes for the Index Searcher.
  • Quality Assurance - If you want to help QA our next build of the Calculator let us know!

Pressed for time? Here are some quick ways you can help!

Where can I get news about upcoming updates?

Visit us on social media, where we annouse all our going-ons.

Contact Info

Copyright Information

GURPS is a trademark of Steve Jackson Games, and its rules and art are copyrighted by Steve Jackson Games. All rights are reserved by Steve Jackson Games. This game aid is the original creation of Jeff M Demers and is released for free use, and not for resale, under the permissions granted in the Steve Jackson Games Online Policy.