the professional unit converter • Free Software • > 6000 units • for Linux, macOS and Windows


The platform specific installers can install the NumericalChameleon on your operating system. Once installed you can deinstall it whenever you want, residue-free. Alternatively you can use the portable solution, e.g. an USB flash drive.

Microsoft Windows

For Windows 7, Windows 8.x, Windows 10 and the Server Variants called Windows Server 2008 R2 and 2012, 2016 and 2019.

Download the .exe-File and start the installer using admin permissions. Click through the install wizard. Please see also the detailled Step by Step-Instructions for the installation of the NumericalChameleons on Windows.


with Debian-Packagemanagement

for Debian, Ubuntu, Mint, Knoppix, Linspire, Xandros, Damn Small Linux, etc.

Dowload the .deb-file and enter on the command line:

    $ sudo dpkg -i ./numericalchameleon*.deb

Alternatively, open the .deb-package using the file manager of your operating systems which starts the graphical packetmanager on many systems. Just follow the instructions coming from the package manager in order to install the software. The .deb extracts all required files to the folder called /usr/share/numericalchameleon and it creates an suitable menu item, preassumed that Gnome or KDE is installed.

with rpm-Packagemanagement

for Red Hat, Fedora, CentOS, openSUSE, Mandriva, Mageia, Unity, etc.

Dowload the .rpm-file and enter on the command line:

    $ su -
    # rpm -ivh numericalchameleon*.rpm

without Debian- or rpm-Packagemanagement

for Arch, Gentoo, Puppy, Slackware, and all others or if you simply don't like package manager.

Download the .bin-file and start the self extracting script using root permissions ...

  sudo bash ./nc-*-install.bin

The self extracting-script extracts all required files to the folder called /usr/share/numericalchameleon and it creates an suitable menu item, preasumed that Gnome or KDE is installed. In addition to that an uninstaller will be created that can be used to uninstall the NC from your computer again.

Alternatively you can install manually. That is useful if you don't have root-permissions.
Download the .tar.bz2-file and extract the tarball to a folder of your choice:

  bunzip2 < ./nc-*.tar.bz2 | tar xfv -


Apple Mac OS X / OS X / macOS

Downlaod the .dmg-file, open it and move the NumericalChameleon icon to the Applications. Alternatively go the portable way.

Other Unix

e.g. for Solaris, FreeBSD, PC-BSD, HP-UX, etc.

see also Linux (without Debian- or rpm-Paketmanagement) or Portable
(on Solaris 10 an earlier you can obtain root permissions using su rather than with sudo)





The Team

The founder of this project is Johann N. Löfflmann from Germany. Since 2001 he has been working with talented people all around the world in order to improve the NumericalChameleon, and learning new areas of knowledge. The list of contributors can always be found in the latest download package and in the copyright section.

GPL v3
OSI certified
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