Convert length, area, volume, mass, temperature units, with Tmetric
Tmetric is a free and light utility you can use for conversions between basic units.
The program supports conversions between Length, Area, Volume, Mass and Temperature units.
* You may also like to check this 10 Unit Converter desktop gadget.
Tmetric delivers what it promises; if supported units cover your needs, it’s a program you may like to try.