Convert It!

Convert It! screenshots

It is probably the most customizable unit conversion utility
Convert It! 3.5 : General View

Alternative downloads

Sound Energy Volume Control
1.0.5
FREE
Directly tired to your PC's volume control.
ESBUnitConv Pro
10.2
User friendly Windows Util to easily convert between 902 units of measurement.
Volume Calculator
1.2
Super fast with no convert button required.