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


The NumericalChameleon is free, open source, platform-independent and comprehensive software in order to convert units with a precision of up to 1000 decimal places.

It supports more than 6000 units in 94 categories, including not only all important physical units in categories like length, area, volume, electricity, magnetism, force, power, energy, pressure, mass, temperature, velocity, acceleration, radioactivity, fuel consumption, time, etc. but also useful units in non-standard categories like exchange rates, time zones, spoken numbers (literally and by audio), roman numerals, geographic coordinates, radixes, fractions, checksums, bits&bytes, screen resolutions, colorcodes, unicodes, international dial codes, calendar and holiday calculations and many more.

It can be run as portable app or as an installed app it can be run on single and multi-user environments in networks on all supported platforms (Windows, Linux, macOS, Unix, etc.) locally or on the network.

It provides a dynamic, modern graphical user interface. It has been internationalized and localized in many languages. You have unlimited access on all categories, units, icons, filters and themes. You can add, modify, hide or delete them. All configuration data are stored in flat files. Since the format of the output can be configured, data exchange with other software is easy.

The NumericalChameleon is released under the terms of GNU GPL 3 or later.

For detailed information see features and examples.





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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