This is a unit converter program written in Python, programmed by Joseph Nicholas.
It has all the most commonly used units for length, temperature, pressure, mass, speed, energy, time, area, and volume!
Download the stand-alone Unit Converter for Windows here: Unit Converter v2.0 [2.71 MB]
For Linux, Mac, and Windows, you can download the source here: Unit Converter v2.0 source [6 KB]
However you will also need to download and install Python and wxPython (both are free, make sure you install Python before wxPython).
Updates from v1.2 to v2.0:
Completely redid the user interface.
Added the ability to change the order the units are sorted in.
Now rounds to significant figures instead of decimal places.
Added the ability to change the default number of significant figures.
Added a new category: circular measure.
Added kilocalories to energy/work.
Added pascals and kilopascals to pressure.
Added knots and the speed of light to speed/velocity.
Added fathoms and leagues to length.
Fixed some errors in the conversion factors.
Updates from v1.1 to v1.2:
Added kilometers per minute, kilometers per second, miles per minute, and miles per second to speed/velocity.
Updates from v1.0 to v1.1
The option to select the number of decimal places in the converted number.