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Head-to-head · Scientific Calculator Apps

KCalc vs Qalculate!

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score KCalc #5 in Scientific Calculator Apps 8.1/10 Free plan Free plan✓ 1 of 6 features Visit KDE
Qalculate! #6 in Scientific Calculator Apps 8.0/10 Free plan Free plan✓ 1 of 6 features Visit Qalculate!

KCalc leads on 1 check, Qalculate! on 1, and 1 is even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreKCalc · 8.1/10
  • Free planboth

KCalc scores higher on our rubric for scientific calculator apps: 8.1 against 8.0 out of 10; our editors rank them #5 and #6.

KCalc offers statistics tools; Qalculate! doesn't publish it. Qalculate! offers offline mode; KCalc doesn't publish it.

KCalc is the better fit for linux users needing a focused scientific calculator. Qalculate! is the better fit for desktop users needing advanced math without a fee.

  • KCalc fits best

    Linux users needing a focused scientific calculator

  • Qalculate! fits best

    Desktop users needing advanced math without a fee

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.

Side by side

Feature KCalc 8.1/10 Visit ↗ Qalculate! 8.0/10 Visit ↗
At a glance
Editor score 8.1 8.0
Ranking #5 in Scientific Calculator Apps #6 in Scientific Calculator Apps
Best for Linux users needing a focused scientific calculator Desktop users needing advanced math without a fee
Pricing model Free Free
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop
Platforms Linux Windows, Linux, macOS
Support Docs, Community Docs
Built for Solo, Small business Solo, Small business
Features KCalc 1/6 · Qalculate! 1/6
Equation solving Not published Not published
Statistics tools ✓ (best) Not published
Programmable functions Not published Not published
Complex numbers Not published Not published
Offline mode Not published ✓ (best)
Matrix operations Not published Not published
Specs
Platform support Desktop Not published
Our review
Pros
  • 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.
  • Symbolic math covers factorization, simplification, differentiation, and integration.
  • Plots functions and data, and solves most equations and inequalities.
  • Over 400 functions plus arbitrary precision, unit conversion, and calculation history.
Cons
  • 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.
  • Desktop-only deployment does not cover mobile use.
  • The feature set may exceed the needs of users seeking basic arithmetic.
  • Support channels are limited to documentation.
Our verdict

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…

Read the review →

For desktop users who need more than basic arithmetic, Qalculate! is a free, open-source calculator for Windows, Linux, and macOS. It evaluates expressions with numbers, variables, units, and functions, and offers graphical GTK and Qt…

Read the review →
  1. KCalcScientific Calculator Apps 8.1Free plan
  2. Qalculate!Scientific Calculator Apps 8.0Free plan

Strengths and trade-offs

  • KCalc — 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.

  • Qalculate! — where it wins

    • Symbolic math covers factorization, simplification, differentiation, and integration.
    • Plots functions and data, and solves most equations and inequalities.
    • Over 400 functions plus arbitrary precision, unit conversion, and calculation history.

    Where it doesn't

    • Desktop-only deployment does not cover mobile use.
    • The feature set may exceed the needs of users seeking basic arithmetic.
    • Support channels are limited to documentation.
  • KCalc8.1/10 · Free plan

    A focused, free Linux calculator with scientific, statistical, and number-base tools.

    Visit KDEFull verdict →
  • Qalculate!8.0/10 · Free plan

    A free desktop calculator with symbolic math, equation solving, plotting, and over 400 functions.

    Visit Qalculate!Full verdict →

More comparisons

All scientific calculator apps comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update