KCalc

At a glance

• Editor score
  8.1 / 10
• Pricing
  Free plan
• Best for
  Linux users needing a focused scientific calculator
• Free plan
  Yes
• Paid from
  None
• Platform support
  Desktop
• Facts checked
  28 Sep 2026

• Where it wins

  • Combines scientific, statistical, numeral-system, and bitwise calculations.
  • Results stack, memory registers, and constants support repeat calculations.
  • Configurable precision, display, keyboard shortcuts, and clipboard controls.

• Where it doesn't

  • Its listed platform is Linux desktop, not a cross-platform calculator.
  • Its focus is calculator functions rather than a broader scientific workspace.
  • Support channels are documentation and community.

Our verdict on KCalc

KCalc is KDE’s open-source Linux desktop calculator for people who want arithmetic alongside scientific and statistical functions. It covers trigonometric and hyperbolic functions, logarithms, powers, factorials, and statistics such as mean, median, and standard deviation. Number-base calculations work in binary, octal, decimal, and hexadecimal, while bitwise logic operations and shifts extend its utility for users working with those representations. Its focused scope suits Linux users who need a calculator at the desktop rather than a broader scientific application.

The workflow is centered on calculation and recall. A results stack lets users bring previous results back into a calculation, while memory registers and scientific constants provide additional ways to reuse values. Precision and displayed digits are configurable, and the display’s colors and font can also be changed. Keyboard shortcuts and clipboard copy and paste support direct interaction with numbers. Together, these controls make KCalc adaptable for repeated calculations without changing its core role as a calculator.

KCalc is distributed under the GPL-2.0-or-later license and is installed through Linux distribution packages or AppStream stores. KDE provides documentation and community support. The listed deployment is Linux desktop, so it is a natural fit for Linux users seeking a free, open-source calculator with scientific, statistical, numeral-system, and bitwise features. Its scope is deliberately centered on those calculator tasks; teams looking for a broader scientific workspace or users who need a calculator on other platforms should consider a different kind of tool.

KCalc pricing

KCalc fact sheet

Alternatives to KCalc

• WWolfram|AlphaBroad computational answers across math, science and more, with paid step-by-step help.9.3
• GeoGebraA broad, visual math toolkit for learners, with graphing, algebra practice, and classroom tools.9.1
• Desmos Scientific CalculatorA focused web calculator for scientific functions, lists, variables, and complex numbers.8.8

See all KCalc alternatives →

KCalc vs the competition

• KWKCalc vs Wolfram|Alpha
• KKCalc vs GeoGebra
• KKCalc vs Desmos Scientific Calculator
• KKCalc vs GNOME Calculator
• KKCalc vs Qalculate!
• KCSKCalc vs Calcrivo Scientific Calculator

Compare KCalc with any tool side by side →

Featured on iTechGuides

KCalc is listed in our Scientific Calculator Apps directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 9 Oct 2026 · How we research and update