Qalculate!
Qalculate! is a multi-purpose desktop calculator for GNU/Linux. It is 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 (GTK+).
How to Install Qalculate!:
Snap
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo apt-get update
3. Press Enter or Return and type in your password
4. Type the following command: sudo snap install qalculate
5. Type Y and press Enter or Return
Ubuntu Repositories
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo apt-get update
3. Press Enter or Return and type in your password
4. Type the following command: sudo apt-get install qalculate
5. Type Y and press Enter or Return
Snap
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo apt-get update
3. Press Enter or Return and type in your password
4. Type the following command: sudo snap install qalculate
5. Type Y and press Enter or Return
Ubuntu Repositories
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo apt-get update
3. Press Enter or Return and type in your password
4. Type the following command: sudo apt-get install qalculate
5. Type Y and press Enter or Return
How to Remove Qalculate!:
Snap
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo snap remove qalculate
3. Press Enter or Return and type in your password
Ubuntu Repositories
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo apt-get remove qalculate
3. Press Enter or Return and type in your password
Snap
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo snap remove qalculate
3. Press Enter or Return and type in your password
Ubuntu Repositories
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo apt-get remove qalculate
3. Press Enter or Return and type in your password
Illustrated Instructions
Snap
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
Snap
1. Open the Terminal (Shortcut: Ctrl + Alt + T)
2. Type the following command: sudo apt-get update
3. Press Enter or Return and type in your password
3. Press Enter or Return and type in your password
4. Type the following command: sudo snap install qalculate
5. Type Y and press Enter or Return
Ubuntu Repositories
4. Type the following command: sudo apt-get install qalculate
5. Type Y and press Enter or Return
4. Type the following command: sudo apt-get install qalculate
5. Type Y and press Enter or Return
6. Close the Terminal after the installation completes.
Self-contained binaries:
qalculate--x86_64.tar.xz
Extract and run from anywhere on most GNU/Linux distributions. The binaries are statically compiled against libqalculate, icu, and mpfr, libcurl, openssl, readline, and termcap, but requires that GTK (>= 3.10) is installed.
qalc - CLI application
qalculate - GUI application
Also includes an install script and an update script:
- Run install to install an icon and a desktop file.
- Run update, from a terminal window, to check if a new version is available and update the binaries (qalc and qalculate).
This can also be done from within the GUI.
Self-contained binaries:
qalculate--x86_64.tar.xz
Extract and run from anywhere on most GNU/Linux distributions. The binaries are statically compiled against libqalculate, icu, and mpfr, libcurl, openssl, readline, and termcap, but requires that GTK (>= 3.10) is installed.
qalc - CLI application
qalculate - GUI application
Also includes an install script and an update script:
- Run install to install an icon and a desktop file.
- Run update, from a terminal window, to check if a new version is available and update the binaries (qalc and qalculate).
This can also be done from within the GUI.
7. Click on the Application menu, highlight Education, and then click on Qalculate! It may not load
immediately and you may have to click on Qalculate! for second time to get it to load. The first time you
run the program it has to fetch the exchange rates from the Internet in order to accurately convert between
different currencies.
immediately and you may have to click on Qalculate! for second time to get it to load. The first time you
run the program it has to fetch the exchange rates from the Internet in order to accurately convert between
different currencies.
Ubuntu MATE Users:
Look in the Accessories menu if you don't see Qalculate! in the Education menu. You may have to reboot your system before it shows up in a menu on your system. If you still don't see an icon in your menu then open up the Main Menu tool to manual add an icon. (Click on System > Preferences > Look and Feel > Main Menu.) Click on the Education menu on the left when the Main Menu dialog box appears. Then click on the +New Item button on the right to create a menu application icon for the selected menu. When the Create Launcher dialog box appears, enter the following:
Type: Application
Name: Qalculate!
Command: /home/tommy/.local/bin/qalculate (Replace tommy with your account name)
Comment: Powerful and easy to use calculator
Next, click the square icon on the left and locate an icon for the program. Then click the OK button when you finish in the Create Launcher dialog box to close it. You can then click on the Move Up or Move Down button in the Main Menu dialog box to move the icon and program in alphabetical order. Then click the Close button to exit the Main Menu dialog box.
Look in the Accessories menu if you don't see Qalculate! in the Education menu. You may have to reboot your system before it shows up in a menu on your system. If you still don't see an icon in your menu then open up the Main Menu tool to manual add an icon. (Click on System > Preferences > Look and Feel > Main Menu.) Click on the Education menu on the left when the Main Menu dialog box appears. Then click on the +New Item button on the right to create a menu application icon for the selected menu. When the Create Launcher dialog box appears, enter the following:
Type: Application
Name: Qalculate!
Command: /home/tommy/.local/bin/qalculate (Replace tommy with your account name)
Comment: Powerful and easy to use calculator
Next, click the square icon on the left and locate an icon for the program. Then click the OK button when you finish in the Create Launcher dialog box to close it. You can then click on the Move Up or Move Down button in the Main Menu dialog box to move the icon and program in alphabetical order. Then click the Close button to exit the Main Menu dialog box.
8. Once the program loads, you'll be able to use it.
User Interface:
Main Window
Main Window
Keypad
Examples:
Plotting
To plot functions or data sets, select File → Plot Functions/Data, which brings up the plot dialog. The plot dialog consists of three tabs/pages — the first for the data, the second for the function range and sampling rate, and the last for control of function sampling and appearance.
Plotting
To plot functions or data sets, select File → Plot Functions/Data, which brings up the plot dialog. The plot dialog consists of three tabs/pages — the first for the data, the second for the function range and sampling rate, and the last for control of function sampling and appearance.
Conversion View
Currency Conversion
Among units, Qalculate! has support for currencies with up-to-date exchange rates. Currencies are normally referenced with the standard three letter code due to name clashes, but a number of currency unit can also be accessed through their regular name and symbol. U.S. dollars can, for example, be referenced both as USD and dollar/dollars, or with the $ symbol.
The exchange rates can to be updated manually from File → Update Exchange Rates, or automatically at specific intervals (by default once every week, but it can be changed in the preferences dialog), when needed (when currencies are converted).
Among units, Qalculate! has support for currencies with up-to-date exchange rates. Currencies are normally referenced with the standard three letter code due to name clashes, but a number of currency unit can also be accessed through their regular name and symbol. U.S. dollars can, for example, be referenced both as USD and dollar/dollars, or with the $ symbol.
The exchange rates can to be updated manually from File → Update Exchange Rates, or automatically at specific intervals (by default once every week, but it can be changed in the preferences dialog), when needed (when currencies are converted).
Periodic Table
Qalculate! has an interactive periodic table that gives you information on each individual element.
Qalculate! has an interactive periodic table that gives you information on each individual element.
Jun 22, 2018