About GURPS Calculator

Jeff at his dining table with a big stein, behind a green battle map with a dragon miniature and paper minis — Jeff running a GURPS game at home, 2013.

Free tools for GURPS 4th Edition: calculators that run right in your browser, character sheets imported from GURPS Character Sheet (GCS), and a GM Board for running the table. Made by a GM, for the GURPS community.

Jeff also GMs the Dark Star Adventurecast, a sci-fi actual play podcast using Stars Without Number: the crew of the Scapegoat runs heists, gang wars and political intrigue in the Veridian Expanse.

Getting help

Every tool has a Help button in its header that explains how it works.
Make your characters in the free GURPS Character Sheet (GCS), then import the .gcs file on the Characters page.
Found a bug or want a feature? Use the bug and feature request form.
See what's new in the Change Log.
Mook made a video tour of the site. It shows an older look, but the tools work the same way.

Support the site

GURPS Calculator is free and has no ads. It's made by Jeff Demers and kept running by people who support his work on Patreon or with a one-time gift. Support covers the site's running costs first; everything past that goes toward the next feature.

This month covered Next up: Attack enemies from your sheet, with automatic damage

✓ Running costs covered: $15 of $15

Pick a target in the encounter and the damage lands on it.

Hosting, domain and payment fees. GURPS Calculator is free and has no ads.

Encounters on the GM Board Funded · now being built

Coming later

Defense prompts when the GM attacks you Your sheet asks you to dodge, parry or block, and rolls it.
One-tap attacks and defenses on the character sheet Roll an attack or a defense straight from the sheet, in one tap.
Conditions and the rolls they trigger Stun, shock, knockdown and major wounds tracked for you, with the HT rolls they call for.

Anything past this month's running costs goes to the next feature.

Support Jeff on Patreon Give once with PayPal

Credits

Made by: Jeff Demers (Dark Star Adventures)
With help from: Jeff Lauder, Ben Gauronskas, Communist Doggo, Travis Ellis
Book index transcription: James Millar, The Index Imp
Treasure Generator: Brian Thomas (DF8 web service), Weby (original data)

And thank you to every patron and donor who has kept the site running over the years.

Privacy

If you make an account, the site stores your login, the characters you import, your campaigns, your character counters, your settings, and campaign dice rolls (kept for 30 days). There are no ads, no analytics and no tracking. Bug reports you send go to the site's issue tracker.

Legal

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.

The 3d logo and the home page banner are set in DSEG7 and DSEG14 by keshikan; text uses Inter, Roboto Slab and JetBrains Mono (all SIL Open Font License 1.1). Theme colours are based on GitHub Primer, Rosé Pine, Atom One Dark, Dracula, Tokyo Night, Noctis and SynthWave '84 (MIT). Built with Bootstrap, jQuery and Knockout (MIT).