Qucs-S

Qucs-S 26.1.1

Qucs-S is a circuit simulation program with Qt-based GUI

  • By The Qucs Team
  • Open Source
  • Updated Apr 26, 2026
Download for Windows

About Qucs-S

Qucs-S is a circuit simulation program based onQucs circuit simulator. The "S" letter indicates SPICE. The purpose of the Qucs-S project is to use free SPICE circuit simulation kernels with the GUI based on Qt toolkit. It merges the power of SPICE and the simplicity of the Qucs GUI.

What's new in 26.1.1

What's Changed
- Bump pillow from 12.1.1 to 12.2.0 in /qucs/python by @dependabot[bot] in #1630
- fix(port): handle empty case (terminated port) by @tskaar in #1628
- Update qucs-s-spar-viewer submodule to v2026.04.14 by @andresmmera in #1631
- Update IT translation by @ra3xdh in #1633
- fix(Xyce): prevent segfault when netlisting without simulations by @tskaar in #1639
- fix(saveAs): append '.sym' for symbol files by @tskaar in #1638
- fix(SpiceLibComp): pin parsing and dialog input validation by @tskaar in #1634
- Fixed SPICE entry for MOSFET if parameters defined as variables and prepare for v26.1.1 release by @ra3xdh in #1641
- Update SP Viewer submodule pointer by @andresmmera in #1642
Full Changelog: 26.1.0...26.1.1

Full release notes »

Technical details

PublisherThe Qucs Team
AuthorVadim Kuznetsov <[email protected]> Mike Brinson <[email protected]>
Version26.1.1
Release date2026-04-26
LicenseGPL-2.0
Installer typeinno
Architecturex64
Package IDTheQucsTeam.Qucs-S

Links & install command

Install Qucs-S from the command line with Windows Package Manager (winget):

winget install --id=TheQucsTeam.Qucs-S -e

circuitsimulator

Older versions

  • 26.1.0
  • 25.2.0
  • 25.1.2
  • 25.1.1
  • 24.4.1
  • 24.4.0
  • 24.3.2
  • 24.3.1
  • 24.3.0