Software · Utilities & files

KCalc

Name: KCalc
Author: KDE

KCalc is a calculator, available on Linux.

Completely free
Linux
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: GPL-2.0+ — Open source (copyleft)confirmed by Flathub, Wikidata
Open source: Yes
Commercial use: Yesconfirmed by Flathub, Official plan pages (pricing, licence, terms)
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: LinuxEstablished by Linux: Flathub
Publisher: KDE
Latest version: 26.08.2 (8 October 2026)
Latest activity: 6 November 2026
Source code: invent.kde.org/utilities/kcalc

At a glance

All of KCalc is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

KCalc has everything you would expect from a scientific calculator, plus: Trigonometric functions, logic operations and statistical calculations A results stack which enables convenient recall of previous calculation results Precision is user-definable The display allows cut and paste of numbers The display colors and font are configurable, aiding usability The use of key-bindings make it easy to use without a pointing device

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 9 November 2026
Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 6 November 2026
Facts collected from Wikidata (licence, platforms) — 5 November 2026
Last technical check: 5 November 2026
Description from Flathub — AppStream (Flathub)

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