Tools & Platforms
GURPS Calculator
GURPS Calculator is a free site for GURPS 4th Edition players and GMs. The calculators handle the rules people look up mid-session: collision and fall damage, demolitions, hiking distance by terrain and weather, jumping, throwing, how long it takes to learn a skill, plus a dice roller for 3d checks and damage. Each one cites its Basic Set page and runs in the browser without an account.
Make an account and you can import characters from the free GURPS Character Sheet (GCS) program and play from the sheet on the site, with HP and FP tracked and attacks rolled in place. GMs can start a campaign and have their players join it. The GM Board shows the whole party’s stats and counters alongside the encounter, and Campaign Rolls shares every die roll with everyone playing. There are no ads, no analytics and no tracking. The site has been running since 2015, built by Jeff Demers and kept going by patrons and one-time donations.