Ultimate desktop calculator
Qalculate is a multi-purpose desktop calculator for GNU/Linux. Qalculate is extermely small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface (KDE or GTK+).

The options on Qalculate in Linux just blows the Windows calculator away. Imagine a calculator where you can solve extremely complicated expressions, or just convert between different measurements, and you’ve got Qalculate.

Install Qalculate on Ubuntu Linux
1. Goto Applications -> Accessories -> Terminal.
2. Type in the following command,

sudo apt-get install qalculate

3. Then the installation process will start.

Cool Features of “Qalculate”

• User Interface
• Graphical user interfaces implemented using KDE or GTK+-2.0 and Glade XML
• Flexible expression entry and separate result display
• Displays whether result is precise or not
• Practical menus give fast access to all advanced features
• Calculation history
• Optional traditional calculator buttons
• Dialogs for management of and easy access to functions, variables and units (with quick conversion)
• User friendly dialogs for functions, with description and entries for arguments
• Create/edit functions, variables and units
• Easy editing of matrices and vectors
• Easy interface to gnuplot
• Separate window for fast conversion between number bases
• Periodic table
• Small separate utilities for base, currency and unit conversion
• Additional text based interface with full functionality

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