There are many alternatives to Qalculate! for Windows if you are looking for a replacement. The best open source Windows alternative is SpeedCrunch. If that doesn't suit you, our users have ranked more than 100 alternatives to Qalculate! and 15 are open source and available for Windows so hopefully you can find a suitable replacement. Other interesting open source Windows alternatives to Qalculate! are Numbat, Numara Calculator, Windows Calculator and Giac/Xcas.
SpeedCrunch is a free, fast, high precision open source algebraic calculator with an intuitive interface and many features, such as variables, syntax highlighting, functions, persistent input history & more.
High precision scientific calculator with full support for physical units (web and terminal versions).
A simple yet powerful calculator that includes standard, scientific, and programmer modes, as well as a unit converter. It's the perfect tool to add up a bill, convert measurements in a recipe or other project, or complete complex math, algebra, or geometry problems.
Giac/Xcas is a free computer algebra system for Windows, Mac OS X and Linux/Unix (license GPL3, for commercial dual-license contact us).
The breadth of available constants and units along with a robust command line syntax.
ImaginaryInfinity Calculator is an expandable calculator. It's command line interface is designed to resemble that of some graphing calculators. New functionality can easily be added by installing user created plugins.
A calculator with syntax highlighting that supports user-defined variables and functions, math-like syntax, and some more advanced operations such as derivation and integration (estimate), and complex numbers.
Programmable scientific calculator which has more than 150 mathematical functions and all of them return as many digits as you need. It can calculate with real numbers, complex numbers, fractions, vectors, matrices. Commands if, goto and print can be used to create scripts.
GraphCalc is an all-in-one solution to everything from everyday arithmetic to statistical analysis, from betas to Booleans, from cubes to calculus, from decimals to derivatives. GraphCalc combines all the features of a professional mathematics package with the simplicity of an...
A kickass, open-source calculator that lets you do calculations and unit conversions naturally, with features like:
TTCalc is an open source bignum mathematical calculator. It features arithmetical functions, trigonometric functions, inverse trigonometric functions, hyperbolic functions, inverse hyperbolic functions, logical operators, logarithms, functions for converting between degrees and...
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It's like comparing one of the dollar store calculators to a TI-89