Qalculate!

- the ultimate desktop calculator

Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation). Features include a large library of customizable functions, unit calculations and conversion, physical constants, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface (GTK, Qt, and CLI).

Qalculate! is free software, licensed under the GNU Public License v2 (or later).

Latest News

2024-05-07

Qalculate! version 5.1.1 released

This version fixes a^(f(x)) = (a^b)^(g(x)), where b equals -1, 2/3, 2 or 3, and f(x) does not equals g(x). Only libqalculate has been updated.
2024-05-06

Qalculate! version 5.1 released

Changes:
- Support for solving equations containing if() function
- Support for solving root(a, x)=b (requires rational value for ln(a)/ln(b))
- New functions: powertower() and multiples()
- New units for solar radius, mass, and luminosity
- Ask for the desired interpretation the first time percent addition is used (e.g. 100 + 10% equals 110 or 100.1)
- Use parentheses for exponent using scientific notation (with power of 10)
- Support integer factorization of integers in matrix/vector, and of numerator and denominator in rational number
- Relaxed conditions for (x^a)^b = x^(a × b) and x^a × x^b = x^(a + b) when complex numbers are deactivated (fixes segfaults)
- Fix (ax + n)^2 > 1, where n is even and a is not 1, returning false
- Fix setbits() function
- Fix Number::equals(0, ..., true) when number is infinite (affects replace() function)
- Add two's complement input and binary bits to preferences, and preserve these settings when leaving programming keypad (GTK, Qt)
- Download button in dialog shown when new version is available, on Windows (GTK, Qt)
- Fix AltGr (primarily for input of operators) on Windows (GTK, Qt)
- Option to show parsed expression in result field (GTK)
- Portuguese (Portugal) translation (GTK)
- Fix updating of self-contained GNU/Linux binaries from GUI (GTK)
- Improved history list efficiency (Qt)
- Hide expression tooltip (after 300 ms) when input resumes, if delayed expression status is enabled (Qt)
- Minor bug fixes and feature enhancements